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Popocatépetl webcam object reports

civilian visual reports / webcam review · 2013 · Popocatépetl, Puebla/Morelos · Mexico

Also known as: Popocatépetl volcano UFO, Mexico volcano webcam UFO videos, OVNIs del Popocatépetl 2013, Don Goyo webcam object

This subject is a media and internet-era cluster of apparent aerial-object anomalies recorded in, or attributed to, cameras observing Popocatépetl, the active Mexican volcano commonly called Don Goyo.

Words
4,252
Observations
11
Reference leads
6
Validation score
100/100

Overview

The bounded core concerns material circulated during 2013, while recalled discovery leads also attach visually similar clips to 2008 and 2012. It should therefore not be treated as one witnessed encounter, one instrumentally established object, or one continuous sequence. Rather, it is a transmission network in which individual short recordings, still frames, television segments, reposted videos, and interpretations became associated with the same highly recognizable volcano.

Reports typically describe a luminous, pale, dark, elongated, or cigar-like form moving near the summit, plume, or crater. In the strongest paranormal retellings, an object is said to enter, emerge from, or use the volcano. That conclusion does not follow from the remembered imagery alone, because a two-dimensional fixed-camera image generally cannot establish the object’s range, scale, route, physical form, or relation to the crater.

The evidential attraction of the reports is also their principal analytical difficulty. A volcano-monitoring camera may produce a dated, repeatable visual record, unlike an isolated verbal sighting, but it also samples a distant scene through a particular lens, field of view, exposure regime, compression process, and frame cadence. A small item near the lens can appear aligned with the summit; an aircraft, meteor, satellite, bird, insect, ash clump, or wind-borne debris can appear to cross the mountain; a long exposure, temporal subsampling, interlacing, digital compression, glare, bloom, or motion blur can transform a point into an elongated trace.

The active volcano supplies genuine ash emissions, incandescent material, cloud, steam, changing illumination, and turbulent atmosphere, all of which are likely to be meaningful visual confounders. The recalled material does not provide authenticated original files, complete adjacent footage, calibrated camera positions, weather data, aviation correlations, or independently identified eyewitnesses for a specific 2013 clip. The appropriate unit of research is consequently the discrete recording rather than the broad phrase Popocatépetl UFO.

Each candidate should be assigned an original camera, observation window, timestamp standard, complete sequence, camera orientation, exposure and frame information, first public appearance, and chain of reposting. A comparison with volcano activity, weather, celestial geometry, nearby aviation, and other cameras can then test ordinary possibilities. This dossier records the claims as reports and preserves the cultural appeal of a volcano-centered anomalous narrative without treating any extraordinary interpretation as verified.

One highly similar 2013 cigar-shaped-object entry is proposed for merger because it appears to describe the same central webcam-media episode, subject to later provenance testing. The separately dated 2008 and 2012 materials remain connected comparison leads rather than automatically merged cases.

Chronology and case boundaries

The earliest recalled component is a possible 2008 grouping of Popocatépetl camera or broadcast anomalies. It is not securely established here as a single event. Later online circulation may have attached an incorrect year, reused a clip, or condensed several reports into a retrospective volcano-UFO theme.

Its importance is methodological: the recognizable volcano background allows old material to be repeatedly repackaged while making a new claim appear visually plausible. A researcher should not infer that an object shown in a later compilation was recorded in 2008 merely because the caption says so.

A more prominent recalled wave of attention occurred in 2012, when webcam images or videos were circulated as showing bright or elongated forms near the volcano. Some narration reportedly treated a form as entering or emerging from the crater. The time, actual direction of travel, and apparent proximity are not established by a reproduced short clip or still image.

The 2012 material is close in genre and setting to the 2013 cluster but is provisionally a separate dated report. It must be traced to an original monitoring sequence before it can be compared frame by frame with 2013 content.

The canonical date label is 2013. During an active period for the volcano, Mexican media and UFO-oriented commentators repeatedly highlighted brief apparent objects in monitoring imagery. Recalled descriptions vary between a luminous form, a solid-looking dark form, and an elongated or cigar-shaped object.

This variation may indicate multiple clips, differences caused by processing and reproduction, or later captioning rather than several independently corroborated objects. No recalled evidence here fixes an exact day, local time, camera, or uninterrupted duration for the core 2013 recording.

A particular 2013 item was widely framed as a cigar-shaped object passing near, or entering, Popocatépetl. That wording has likely become a label for the episode rather than a measured description. A frame streak can look cigar-shaped because the camera records motion over time, because a near object is out of focus, or because compression joins bright pixels.

Conversely, an actually elongated-looking trace does not by itself identify a manufactured craft. The first task is to recover the longest available native or broadcast-quality sequence and determine whether the shape persists through adjacent frames.

After initial circulation, the reports became part of a durable Popocatépetl UFO repertoire. New articles, social-media posts, and video compilations could juxtapose clips from different years under a common title, often emphasizing the volcano as a destination or portal for anomalous craft. This later transmission is an event in the dossier’s history, not evidence that all clips depict the same phenomenon.

The chronology therefore remains deliberately layered: possible observation date, recording date, first broadcast or upload date, and later repost date should be recorded separately whenever sources are retrieved.

People, organisations, and setting

Popocatépetl rises in central Mexico near the Puebla, Morelos, and State of Mexico region and is visible across a densely populated landscape that includes routes and urban areas associated with the Mexico City and Puebla valleys. Its dramatic summit silhouette makes it an unusually effective backdrop for distant video. A camera need not be located on the volcano for a passing foreground item to appear adjacent to the crater, because a line-of-sight alignment collapses great differences in distance into the same image plane.

Any future case record should distinguish the camera’s physical location from the reported location of the apparent object.

The volcano’s activity is central context rather than decorative background. Plumes of steam, gas, ash, and cloud can alter contrast and obscure depth. Eruptive or exhalation-related materials, thermal glow, lightning, and changing daylight may create unusual visual conditions, while winds at different elevations can cause features to move in ways that are hard to infer from a single viewpoint.

The proper comparison set includes volcanic monitoring information, meteorological observations, and imagery from other cameras that had a materially different angle.

The principal human participants identified by the recalled material are anonymous camera viewers, television producers and presenters, online uploaders, journalists, UFO commentators, and audiences who copied or captioned the material. Their roles are not equivalent. A monitoring operator may preserve an original sequence, whereas a broadcaster may use only a selected extract, and a later uploader may inherit neither original metadata nor the original date.

The lack of named, independently interviewed observers should be recorded as a limitation rather than filled with assumptions about witnesses.

Volcano-monitoring institutions, including the Mexican civil-protection and volcanological bodies commonly associated with public Popocatépetl imagery, are relevant potential custodians of context and source material. This dossier does not assert that any specific institution captured any particular claimed anomaly, issued an interpretation, or retained a requested sequence. Television outlets and UFO-media channels are likewise transmission nodes to identify rather than independent validators.

Their editorial choices can affect speed, cropping, narration, color treatment, and the prominence of an extraordinary explanation.

The local cultural name Don Goyo and the volcano’s established place in Mexican public life help explain why ordinary ambiguous imagery acquires special narrative force. A large active mountain combines danger, familiarity, folklore, spectacle, and a clear visual target. This does not invalidate the reports, but it predicts interpretive convergence: viewers may treat motion toward the volcano as intentional interaction with it even when neither object distance nor trajectory is known.

Such cultural context belongs in the analysis because it helps explain repeated attention without deciding what any individual image depicts.

Reported visual, sensory, and behavioural phenomena

The reported phenomena are overwhelmingly visual and mediated rather than close-range multisensory encounters. Recalled descriptions include brief bright points, pale lights, dark silhouettes, solid-looking forms, and elongated or cigar-like streaks near the summit, crater, or plume. The background is normally the volcano, sometimes with cloud, vapor, ash, darkness, dawn or daylight conditions, rather than a blank sky.

No stable physical dimensions can be derived from these descriptions because neither object range nor camera calibration is supplied.

Behavioural language in retellings is stronger than the raw observation warrants. An object may be said to approach, descend into, emerge from, hover over, or pass behind the crater. In a single fixed view, however, apparent approach to the summit can be simple angular motion across the background.

A form that disappears against dark terrain, enters cloud, leaves the frame, becomes overexposed, or is lost through compression can be narrated as entering the volcano. These are interpretive verbs and should be stored separately from frame-level observations.

The elongated morphology is especially important. A fast bright source sampled with a comparatively long exposure can form a line or dash; a moving near object may be blurred; deinterlacing or compression can produce unusual outlines; and a frame extracted from video may not accurately represent the source object’s shape. If the object remains similarly elongated across many high-quality frames while changing orientation in a way consistent with a three-dimensional body, that would be more informative, but such evidence has not been established in the recalled record.

No reliable sound, smell, heat, electromagnetic effect, ground trace, radar return, aircraft report, physiological effect, or independently verified physical interaction is recalled for the core cluster. The absence of these data does not establish that they were absent at the time, but it sharply limits the claim to a visual-media anomaly. The reports should not be expanded into a close encounter merely because later storytelling supplies motive or destination to the apparent object.

The sensory environment of the camera itself needs attention. Automated exposure can brighten or suppress a luminous point depending on cloud and volcanic glow. Focus, condensation, dust, water droplets, vibration, pixel blooming, optical reflections, and low-light noise can all contribute visible features that viewers describe as objects.

A full investigation would note whether the feature is sharp relative to the background, whether it has lens-consistent glare, whether it moves with camera shake, whether it recurs at a fixed sensor position, and whether it appears on other views.

Investigation history and evidential priorities

The recalled investigation history is principally public review rather than a documented, controlled inquiry. The material appears to have been noticed through volcano-monitoring images, television coverage, and UFO-oriented commentary. Analysts and commentators reportedly proposed both extraordinary and conventional readings, but the present record does not identify a complete technical report, authenticated native file, or formal institutional conclusion for the central 2013 item.

Assertions that the object was large, close to the crater, or definitely entering it should therefore be treated as untested interpretations.

A rigorous reconstruction begins by creating a separate dossier for every claimed clip. Each record should preserve the claimed observation date and local time, original filename if available, earliest known upload or broadcast, resolution, codec, duration, frame rate, still-frame extraction method, camera owner, camera coordinates, field of view, bearing, and whether the image was live, archived, rebroadcast, cropped, sped up, slowed down, stabilized, or color graded. Hash comparison and reverse-image comparison can reveal whether differently titled posts use the same footage.

The next stage is temporal and geometric analysis. The apparent object’s pixel coordinates should be plotted across consecutive frames together with the volcano skyline and fixed foreground features. Investigators should calculate only conditional estimates, such as angular movement under stated assumptions, rather than asserting speed without range.

A camera’s exposure behavior and night-mode operation need testing with ordinary lights and aircraft. If two cameras were operating, parallax or matched timing could distinguish a nearby insect or bird from a distant aerial source.

Context checks should include volcano activity, plume direction, weather, wind, cloud layers, precipitation, lightning reports, sun and moon position, bright planets, satellite or meteor possibilities, and nearby flight paths where suitable records exist. These checks can rule in or out candidate classes, but they must use a securely established timestamp. It is unsound to correlate an object with a volcano exhalation or air-traffic record when the clip’s date has been inferred from a later caption.

A carefully dated mundane match would be stronger than a visual resemblance alone.

The final evaluation should retain graded alternatives instead of forcing a binary answer. A conclusion of unresolved image anomaly may be warranted if provenance is good but imagery remains insufficient. That is not positive evidence for a non-human craft.

Conversely, a plausible aircraft, meteor, bird, insect, volcanic material, or artifact explanation should be accompanied by its assumptions and its fit to the sequence. The evidential value depends heavily on the full provenance chain, which remains the main unresolved issue in this recalled dossier.

Disagreements, interpretive conflict, and alternative explanations

The primary disagreement concerns what it means for an object to appear near a volcano in a two-dimensional recording. UFO advocates may regard the apparent alignment with the crater, unusual speed, illumination, or disappearance as evidence of deliberate passage into the mountain. Skeptical readings hold that the recording does not show the necessary depth information and that the volcano is a visually compelling but potentially misleading background.

Neither side’s strongest conclusion can be justified solely by a short, low-provenance extract.

Aircraft are a relevant possibility for bright or steady moving lights, although an aircraft explanation requires a timestamp, viewpoint, direction, and route consistent with the imagery. A meteor could account for a rapid linear luminous passage in a short interval, while a satellite is more plausible for smooth motion under darker conditions but may not fit every apparent path or brightness. A bird, insect, or airborne debris close to the lens can appear unexpectedly large, blurred, or fast relative to the distant volcano.

These explanations are candidates, not retroactive identifications in the absence of specific sequence analysis.

Volcanic and atmospheric explanations also require case-specific testing. Ash, glowing ejecta, cloud edges, plume fragments, and wind-driven material may create transient forms, yet their apparent movement, brightness, and position depend on lighting and camera geometry. Atmospheric turbulence can distort distant details, while cloud can hide or reveal a light abruptly.

Lens flare, internal reflection, dead pixels, sensor bloom, compression blocks, interlacing, and time-lapse artifacts can create or reshape a feature without an external object at all. The remembered reports do not supply enough original technical data to rank these mechanisms decisively.

A second dispute concerns scale. Dramatic retellings may call a form enormous because it seems comparable in length to part of the volcano. That comparison is invalid unless the object is known to be at the volcano’s distance.

A small foreground insect or distant aircraft can occupy a similar number of pixels for entirely different reasons. Claims of extraordinary speed face the same problem: pixels per frame do not become kilometers per hour until range, lens characteristics, timing, and frame treatment are independently established.

Finally, there is a dispute about repetition itself. Recurrent reports from the same volcano can be presented as cumulative confirmation of an ongoing anomalous presence. They can also be understood as the predictable output of heavily watched scenery, active volcanic conditions, varied camera artifacts, and a strong media narrative that prompts viewers to scan footage for salient irregularities.

The present evidence supports neither a proven recurring extraordinary phenomenon nor a single universal mundane cause. It supports careful separation of individual clips and caution about narrative aggregation.

Transmission, genre, and commercial influences

The reports belong to a hybrid genre: public-safety and scientific monitoring imagery becomes spectacle when a brief anomaly is framed as a mystery. A volcano webcam has institutional associations that can lend an ordinary video an aura of official observation, even when the later interpretation originates with a broadcaster, commentator, or uploader rather than the monitoring body. The visual authority of a fixed camera may make viewers overlook the absence of depth, metadata, and complete footage.

Transmission likely moved from live or archived camera output through broadcast editing, news discussion, UFO-program commentary, video-sharing sites, blogs, social-media posts, and later compilations. At each step, a sequence can be shortened, replayed, slowed, enhanced, zoomed, narrated, assigned a different date, or paired with unrelated volcano footage. Search titles such as UFO over Popocatépetl, object entering the volcano, or Don Goyo mystery can make material from separate years appear to describe the same event.

The record should preserve captions as claims made at a particular transmission stage rather than treating them as original metadata.

Commercial and attention incentives are relevant but should not be overstated. Dramatic thumbnails, alarming headlines, paranormal framing, advertising-supported views, broadcast ratings, channel subscriptions, and the low cost of reposting can all favor a striking interpretation over a technical one. This does not prove deception by any particular participant.

It does explain why a brief ambiguous segment may be selected and amplified while a mundane context sequence, correction, or uncertainty receives less circulation.

The Popocatépetl setting also produces a recognizable branded subgenre. Repeated claims can borrow credibility from one another through visual resemblance, even when their provenance differs. A new clip may be captioned with language established by an earlier episode, such as cigar-shaped craft or objects entering the crater.

As a result, transmission history is not peripheral metadata; it is part of the mechanism by which the category of Popocatépetl UFO reports is constructed.

A responsible archive should retain original-language titles where recovered, but should not silently translate a sensational phrase into a stronger factual assertion. It should mark whether a claimed date refers to observation, upload, broadcast, repost, or commentary. It should also preserve uncertainty when an alleged original is only a cropped derivative.

These practices allow later researchers to study the folklore and media history without confusing its circulation volume with corroboration.

Cross-case connections and comparative motifs

The strongest comparative motif is the monitored-volcano anomaly. Similar claims around other active mountains often combine a prominent fixed landmark, intermittent low-light footage, weather or plume effects, and a suggestion that an object has interacted with a crater. Comparison can help identify recurring camera and perceptual mechanisms, but it cannot establish that geographically separate reports share a single cause.

The useful comparison variables are camera type, vantage, illumination, plume conditions, frame rate, source provenance, and the form of later narration.

A second motif is apparent ingress or egress from a landmark. This occurs whenever an object becomes visually aligned with a mountain, building, cloud bank, or horizon and then disappears. The interpretive leap from occlusion or loss of contrast to purposeful entry is cross-culturally attractive because it supplies an action and destination.

In this dossier, the motif should be coded as a reported narrative interpretation, not as verified interaction with Popocatépetl.

A third motif is the elongated luminous object. Cigar, rod, capsule, and streak descriptions can arise from a genuinely elongated silhouette, but they also recur across images shaped by motion blur, exposure, compression, and near-lens focus. Cross-case comparison should ask whether the apparent form changes with video processing, whether it is present in native frames, and whether it has a trail or brightness pattern characteristic of a mundane source.

Shape labels should not be treated as stable object taxonomy.

A fourth motif is authority transfer from monitoring infrastructure to paranormal conclusion. A camera used for surveillance, weather, or hazard monitoring may be perceived as scientifically authoritative, while viewers may not have access to its technical specifications or full archive. This gap allows a dramatic cropped image to inherit institutional credibility it does not necessarily possess.

Investigators should distinguish evidence generated by an instrument from claims subsequently attached to that evidence.

The final comparative motif is recycled-date instability. Volcano footage is exceptionally reusable because its background remains identifiable and spectacular. A clip may circulate for years with altered date, location, or interpretation, producing an apparent wave of reports.

This makes provenance testing a core cross-case method. The 2008, 2012, and 2013 Popocatépetl leads are directly connected by this motif but should remain distinct until their original files and transmission paths demonstrate identity.

Limits of the recalled record

This dossier is an unverified recalled synthesis prepared from bounded model knowledge and discovery leads. It does not claim that any original webcam sequence, television broadcast, institutional archive, witness interview, aviation record, meteorological record, or technical analysis was retrieved or consulted. Reference leads below are proposed starting points for later verification only.

Their inclusion does not authenticate the reported dates, titles, details, or interpretations.

The canonical subject is a cluster, and that creates a serious risk of false unity. The 2008, 2012, and 2013 labels may refer to distinct observations, the same footage circulated under multiple dates, visually similar but unrelated clips, or broad media groupings. The proposed merge is intentionally narrow and concerns only the 2013 cigar-shaped-object entry whose description closely matches the central 2013 webcam episode.

It should be reversed if provenance shows that it names a different recording.

The record has no established chain of custody for the images. Without a native file and an auditable source path, frame-level discussion can identify possible mechanisms but cannot deliver a definitive reconstruction. Re-encoding alone can change color, shape, and apparent motion.

A publicly visible timestamp can also be time-zone converted, overlaid later, absent from the source, or associated with a rebroadcast rather than the recording. All dates and visual descriptions must therefore retain status labels.

There is also no reliable estimate of range, altitude, size, speed, mass, or physical interaction. Any such numerical claim would depend on assumptions not supplied in the recalled materials. Nor is there recalled independent corroboration from another synchronized camera, named ground witness, pilot, radar system, or physical trace.

The absence of corroboration should not be converted into a categorical disproof, but it means the case presently supports only limited descriptive conclusions.

The most defensible present conclusion is that Popocatépetl’s monitoring and media environment generated recurring reports of visually ambiguous apparent objects, with a 2013 cigar-shaped-object narrative as a likely central item. The available recalled information is compatible with several ordinary explanations and does not establish an extraordinary craft, a trajectory into the volcano, or a non-human agency. Future work should prioritize provenance and full-sequence analysis before adding interpretive weight to the reports.

Chronology

2008

Possible earlier webcam or broadcast object grouping

A recalled group of Popocatépetl object claims is attributed to 2008, but it is not established as one discrete observation and may contain later recycled or mislabeled footage.

disputed
2012

Webcam object material circulates

Images or video described as bright or elongated objects near Popocatépetl reportedly receive UFO-oriented circulation, with claims of ingress to or egress from the crater requiring source-sequence verification.

reported
2013

Canonical cluster of webcam and media anomalies

Mexican media and UFO commentators repeatedly highlight brief apparent objects near the active volcano, but the recalled record does not securely identify one timestamped core sequence.

reported
2013

Cigar-shaped-object framing

A widely reproduced recording is interpreted by some commentators as a cigar-shaped object passing close to or entering Popocatépetl, while perspective and image-processing explanations remain open.

reported
2013 onward

Reposting and narrative consolidation

Separate videos, stills, and reports are liable to be reposted, edited, and grouped under a durable Popocatépetl UFO narrative, requiring separation of recording date from publication date.

approximate
Unknown

Source recovery and technical assessment remain incomplete

No authenticated original file, complete frame sequence, camera geometry, or documented formal conclusion is established within this recalled record.

unknown

People and roles

Anonymous volcano-camera viewers

Initial observers and disseminators

They may have noticed anomalies in live or archived imagery, but no named individual observer is securely identified in the recalled record.

Mexican volcano-monitoring institutions

Potential camera operators and contextual-data custodians

They are relevant for original imagery and volcanic context, but this dossier does not assert that a particular institution recorded or interpreted a specific clip.

Mexican television news and paranormal-media producers

Broadcast and editorial transmission nodes

They may have selected, cropped, narrated, or amplified footage, but individual outlet involvement must be verified for each recording.

UFO commentators and online video channels

Interpretive and reposting network

They commonly supplied extraordinary framing, but no specific commentator is identified here as the source of a particular 2013 claim.

Volcanologists and meteorological analysts

Relevant conventional-context specialists

Their records and expertise would be needed to assess plume conditions, eruption products, weather, and observational geometry.

Aviation and astronomical data custodians

Potential corroboration or elimination sources

Flight, satellite, meteor, and celestial checks depend on a verified observation time and camera position.

Connections to explore

Monitored-volcano anomaly

An active volcano viewed by fixed cameras supplies a dramatic stable background but also plume, weather, lighting, and perspective confounders.

Suggested search: volcano webcam anomalous object provenance full sequence camera geometry

Apparent entry into a landmark

A feature disappearing against terrain or cloud can be narrated as entering a crater even when depth and trajectory are unknown.

Suggested search: UAP video apparent ingress landmark occlusion perspective analysis

Cigar-shaped or elongated object

Elongation may be a physical silhouette but can also result from exposure, motion blur, compression, or near-lens focus.

Suggested search: video elongated luminous object motion blur compression frame analysis

Authority transfer from monitoring camera

Institutional-looking webcam footage may gain credibility beyond what cropped, re-encoded images can technically support.

Suggested search: webcam footage provenance institutional monitoring camera UFO analysis

Recycled-date instability

Recognizable volcano footage can be reposted under altered dates and captions, creating a false impression of repeated independent events.

Suggested search: Popocatépetl UFO video reverse image earliest upload original timestamp

Unretrieved reference leads

LEADS, NOT CITATIONS These suggestions have not been retrieved or verified. They are starting points for source checking.
  1. Popocatépetl webcam object reports

    Unspecified volcano-webcam operator and later media transmitters · Suggested primary-image and broadcast lead

    This is the central lead for locating time-stamped sequences, camera information, and the earliest obtainable recording of the 2012 and 2013 anomalies.

    Suggested search: Popocatépetl webcam UFO 2012 video date analysis
  2. Popocatépetl cigar-shaped object video

    Unspecified monitoring-camera source and later commentators · Suggested video-provenance lead

    This lead may identify the likely same 2013 recording proposed for merger and permits comparison between original and reposted versions.

    Suggested search: 2013 Popocatépetl cigar shaped UFO video webcam source
  3. OVNIs del Popocatépetl 2013

    Unspecified Mexican news and television archives · Suggested broadcast-archive lead

    Searches may separate individual 2013 segments, their broadcast dates, and their narration from later online compilations.

    Suggested search: 2013 OVNI Popocatépetl webcam objetos luces noticias México
  4. Popocatépetl webcam-object reports, 2008

    Unspecified broadcast and online sources · Suggested comparison and date-verification lead

    This lead is useful for testing whether alleged 2008 footage is distinct, reused, or later mislabeled.

    Suggested search: Popocatépetl ovni 2008 cámara video objeto
  5. Popocatépetl webcam object report, 2012

    Unspecified webcam source and image analysts · Suggested comparison-case lead

    The 2012 report should be traced independently before treating it as part of a 2013 sequence or common object narrative.

    Suggested search: Popocatépetl webcam 2012 UFO image original timestamp analysis
  6. Popocatépetl volcanic monitoring and activity records

    Relevant Mexican volcano-monitoring and civil-protection institutions · Suggested contextual-record lead

    Dated activity, plume, weather, and camera-operation context are necessary to assess volcanic and atmospheric explanations.

    Suggested search: Popocatépetl 2013 monitoring camera archive volcanic activity plume records