Popocatepetl


Sunday Morning Volcano posts (for background):

Useful links

  • It’s a challenge to link to CENAPRED’s updates page. Here is their monitoring portal; for English, click on “Reportes” and then “Mostrar reportes” (it’s blue) and look for the word “English.” Sorry! No alternative found yet.
  • Altzomoni webcam
  • Tlamacas webcam
  • Tianguismanalco webcam
  • GVP background page.

“Challenges in Responding to a Sustained, Continuing Volcanic Crisis: The Case of Popocatépetl Volcano, Mexico, 1994-Present,” easy-to-understand, in-depth scientific background of Popo and its monitoring.


CENAPRED Daily Updates

September 23, 2018: Not all of the Spanish-language bulletin today made it into the English version–parts in brackets are my own translation.


After uncapping some explosively fizzing soda bottles, I’m glad Don Goyo is apparently releasing its own contents gradually!


September 23, 11:00 h (September 23, 16:00 GMT)

In the last 24 hours, through the Popocatepetl volcano monitoring system 49 low intensity exhalations, accompanied by steam, gas and small ammounts of ash were detected. Also five explosions occured at 20:50 h, yesterday (image 1) [which threw some fragments over the north flank of the volcano and produced an ash column of 1.4 km above the crater], and today at 00:18 (image 2) , 00:37 (image 3) [with an ash column of 1.9 km], 06:35 h (imagen 4) and 09:29 h (imagen 5) . The emissions were dispersed towards west-southwest.

Additionally, 442 minutes of low amplitude tremor and two volcanotectonic earthquakes with preliminar magnitud of 1.9, were detected.

At the moment of this report the visibility is limited due to clouds; at earlier hours an emission of steam and gas was observed (image 6) .

CENAPRED emphasizes that people SHOULD NOT go near the volcano, especially near the crater, due to the hazard caused by ballistic fragments . . . and in case of heavy rains leave the bottoms of ravines by the danger of landslides and debris flows.

The Volcanic Traffic Light Yellow Phase 2.


September 22, 2018: Thankfully, Don Goyo has quieted down a bit, except for that one explosion.

September 22, 11:00 h (September 22, 16:00 GMT)

In the last 24 hours, through the Popocatepetl volcano monitoring system 40 low intensity exhalations, accompanied by steam, gas and small ammounts of ash were detected. Also three explosions occured at 14:11 (image 1) , 15:18 (image 2) and 20:23 (image 3) . The first one produced an ash column with height of 2.8 km above the crater. It was dispersed towards west-southwest.

Additionally, 21 minutes of low amplitude tremor were detected.

During the night incandescence and a continuous emission of steam and gas were observed (image 4).

At the moment of this report, an emission of steam and gas is present (image 5) .

CENAPRED emphasizes that people SHOULD NOT go near the volcano, especially near the crater, due to the hazard caused by ballistic fragments . . . and in case of heavy rains leave the bottoms of ravines by the danger of landslides and debris flows.

The Volcanic Traffic Light Yellow Phase 2.


September 21, 2018: Right now, the webcams are clear and Popo is breathtakingly incandescent under the bright moonlight. Pity these aren’t in color!



They also did an overflight today. See how the floor of the crater around that steaming hole is up close to the top of the walls? If an eruption produces a lot of material, there are going to be pyroclastic flows, because there’s no room inside the crater for it. (Learned about this in the “Challenges” paper linked above.)

September 21, 15:40 h (September 21, 20:40 GMT)

UPDATE
Today, with the aid of the Federal Police, a reconnaisance overflight of Popocatepetl##s crater was made . . . The volcano was actively emmitting a continuous plume of steam and gases that made observations difficult . . . Nevertheless, it could be seen that the inner crater remains the same size, and inside, the remains of dome 80, emplaced at the end of August and partially destroyed by the recent explosions, could be seen . . .

September 21, 11:15 h (September 21, 16:15 GMT)

In the last 24 hours, through the Popocatepetl volcano monitoring systems were identify 48 low intensity exhalations accompanied by steam and volcanic gas, also twelve explosions at 11:11 . . . , 11:50 . . . , 12:10 . . . , 12:53 . . . , 13:02 . . . , 13:49 . . . , 14:31 . . . , 15:58 . . . , 16:12 h . . . , 04:36 . . . , 05:30 . . . and 09:18 h, additionally was recorder 152 minutes of tremor and one earthquake at 15:06 h with magnitude of 1.3.

During the night it was partially observed towards the volcano due to the high cloudiness . . .

At the time of this report, we have intermittent visibility to the volcano, we observe that the emission of steam and other gases were disperse in a west-southwest direction . . .

CENAPRED emphasizes that people SHOULD NOT go near the volcano, especially near the crater, due to the hazard caused by ballistic fragments . . . and in case of heavy rains leave the bottoms of ravines by the danger of landslides and debris flows.

The Volcanic Traffic Light Yellow Phase 2.

September 20, 2018: Don Goyo is restless.



September 20, 11:00 h (September 20, 11:00 GMT)

In the last 24 hours, the Popocatepetl volcano monitoring system identified 76 low intensity exhalations accompanied by steam, volcanic gases and small amounts of ash. . . Additionally, eleven explosions were recorded, yesterday at 13:42, 13:49, 15:17 . . . 17:18, 18:37 . . . , 19:08 . . . , 21:21 . . ., 21:28 y 23:35, and this morning at 01:48 y 03:17 h.

Also, 542 minutes of low-amplitude harmonic tremor were recorded.

At the time of this report, we have intermittent visibility to the volcano, we observe that the emission of steam and other gases and ash is dispersed in a west direction . . . .

CENAPRED emphasizes that people SHOULD NOT go near the volcano, especially near the crater, due to the hazard caused by ballistic fragments . . . and in case of heavy rains leave the bottoms of ravines by the danger of landslides and debris flows.


September 15, 2018: I haven’t been able to access the CENAPRED reports page, but the volcanic traffic alert signal is still Yellow, Phase 2. The webcams show some increased activity but nothing more than usual: incandescence at night, fuming and exhalations during the day, and occasional explosions.


September 11, 2018: Lots more tremor! Also, VT events up a bit.


September 11, 11:00 h (September 11, 16:00 GMT)

In the last 24 hours, through the Popocatepetl volcano monitoring systems were identify 93 low intensity exhalations accompanied by steam and volcanic gases (image 1), additionally was recorder 387 minutes of harmonic tremor, three volcanotectonic events, one yesterday at 17:34 h, and two today at 02:05 and 06:49 h, with magnitude Mc 1.4, 2.8, and 1.7 respectively and four explosions, two yesterday at 22:22 and 23:37 h and two today at 03:24 and 08:49 h. (image 2)

During the night was possible to observed incandescence which increase in some episodes (image 3).

At the time of this report, we have intermittent visibility to the volcano, we observe that the emission of steam and other gases were disperse in a north-northeast direction (image 4)

CENAPRED emphasizes that people SHOULD NOT go near the volcano, especially near the crater, due to the hazard caused by ballistic fragments . . . and in case of heavy rains leave the bottoms of ravines by the danger of landslides and debris flows.

The Volcanic Traffic Light Yellow Phase 2.


September 9, 2018: Both explosions and tremor up a bit over the last 24 hours. That’s a lot better than increased tremors and no explosions (which would mean pressure was building up).




September 9, 11:00 h (September 9, 16:00 GMT)

In the last 24 hours, were identified through the Popocatepetl volcano monitoring systems 279 low intensity exhalations accompanied by steam and volcanic gases and eight explosions yesterday at 14:42 h, 16:02 h, 16:03 h, 16:30 h, 21:12 h and 23:32 h and today at 02:41 h and 05:45 h (image 1), (image 2), (image 3), (image 4), (image 5), (image 6), (video 1), (image 7), (image 8). Also, was registered one volcanotectonic earthquake yesterday at 19:11 h with magnitude 2.4. Additionally, were detected 56 minutes of harmonic and low amplitude tremor.

During the night we observed a gently incandecense which increase in some episodes (image 9).

At the time of this report, we have visibility to the volcano, we observe the emission of water vapor and other gases that disperse in a south direction (image 10), (image 11), (image 12), (image 13).

CENAPRED emphasizes that people SHOULD NOT go near the volcano, especially near the crater, due to the hazard caused by ballistic fragments . . . and in case of heavy rains leave the bottoms of ravines by the danger of landslides and debris flows.

The Volcanic Traffic Light Yellow Phase 2.

The scenarios foreseen for this phase are:

1. Explosive activity of low to intermediate level.

2. Ash fall in nearby towns.

3. Possibility of short range pyroclastic flows and mudflows .

Special emphasis is placed on the following recommendations:

1. Continue the safety radius of 12 km, so staying in that area is not allowed.

2. Keep the controlled traffic between Santiago Xalitzintla and San Pedro Nexapa through Paso de Cortés.

3. Civil Protection authorities, keep your preventive procedures, in accordance with their operational plans.

4. People, be alert to the official information disseminated.

In case of ashfall, address the following recommendations:

• Cover nose and mouth with a wet handkerchief or face mask.

• Clean eyes and throat with pure water.

• Avoid contact lenses to reduce eye irritation.

• Close windows or cover them up, and stay indoors as much as possible.

Popocatepetl Volcano monitoring is performed continuously 24 hours a day. Any change in activity will be reported in due course.

DMVEM


September 7, 2018: Will just share a graphic from this morning’s CENAPRED update, showing the gist–exhalations (those “puffs” Don Goyo gives off occasionally) and VT earthquakes up a bit, harmonic tremor decreased:

CENAPRED/UNAM

September 6, 11:20 h (September 6, 16:20 GMT)

In the last 24 hours, were identified through the Popocatepetl volcano monitoring systems 37 low intensity exhalations accompanied by steam and volcanic gases (image 1) (image 2) (image 3) (video 1) (video 2). Also, were registered yesterday an explosion ocurred at 14:01 h, today a volcanotectonic earthquake at 04:19 h with 1.7 magnitud and a total of 141 minutes of low amplitude tremor in this period.

During the night we observed a gently incandecense which increase in some episodes (image 4).

At the time of this report, we have visibility to the volcano, we observe the emission of water vapor and other gases that disperse in a norwest direction (image 5).

CENAPRED emphasizes that people SHOULD NOT go near the volcano, especially near the crater, due to the hazard caused by ballistic fragments . . . and in case of heavy rains leave the bottoms of ravines by the danger of landslides and debris flows.


Low-amplitude tremor back:

September 5, 11:20 h (September 5, 16:20 GMT)

In the last 24 hours, were identified through the Popocatepetl volcano monitoring systems 57 low intensity exhalations accompanied by steam (image 1) (image 2) (image 3). Four explosions were detectead, yesterday at 17:24 and 18:09 h, today at 01:12 h and 04:21 h. Also, a vulcanotectonic event was detected yesterday at 11:32 with a 1.6 magnitude. Finally, a total of 290 minutes of low amplitude tremor was recorded.

During the night we observed a gently incandecense which increase in some episodes (image 4).

At the time of this report, we have visibility to the volcano, we observe the emission of water vapor and other gases that disperse in a west direction (image 5).


No tremor mentioned in this bulletin–will go back to just keeping an eye on Don Goyo’s daily updates and the news and only post here when there is some notable change in activity or any shift of the volcanic “traffic signal” alert status. Glad the Colossus of Puebla has settled down a little!



September 1st, 11:20 h (September 1st, 16:20 GMT)

In the last 24 hours, through the Popocatepetl volcano monitoring systems, 24 low intensity exhalations accompanied by steam were identified (image 1). Additionally, 2 explosions were recorded. In addition, three volcanotectonic earthquakes were detected today at 05:28, 05:50 and 08:34 h, with magnitude of 1.4, 2.4 and 1.4 respectively.

During the night intense incandescence was observed above de crater (image 2) (image 3).

At the time of this report, we can see the continuous emission of volcanic gases in a northwesterly direction (image 4).

At the time of this report, there is no visibility, although earlier it was seen with a slight emission of steam and gas that the wind disperses to the west-southwest (image 7).

CENAPRED emphasizes that people SHOULD NOT go near the volcano, especially near the crater, due to the hazard caused by ballistic fragments (image 5) and in case of heavy rains leave the bottoms of ravines by the danger of landslides and debris flows.

The Volcanic Traffic Light Yellow Phase 2.

The scenarios foreseen for this phase are:

1. Explosive activity of low to intermediate level.

2. Ash fall in nearby towns.

3. Possibility of short range pyroclastic flows and mudflows .

Special emphasis is placed on the following recommendations:

1. Continue the safety radius of 12 km, so staying in that area is not allowed.

2. Keep the controlled traffic between Santiago Xalitzintla and San Pedro Nexapa through Paso de Cortés.

3. Civil Protection authorities, keep your preventive procedures, in accordance with their operational plans.

4. People, be alert to the official information disseminated.

In case of ashfall, address the following recommendations:

• Cover nose and mouth with a wet handkerchief or face mask.

• Clean eyes and throat with pure water.

• Avoid contact lenses to reduce eye irritation.

• Close windows or cover them up, and stay indoors as much as possible.

Popocatepetl Volcano monitoring is performed continuously 24 hours a day. Any change in activity will be reported in due course.

GVCJ


Much less harmonic tremor reported in this bulletin–not surprising, after 36 low-level explosions in five hours!

August 31, 11:20 h (August 31, 16:20 GMT)

In the last 24 hours, through the Popocatepetl volcano monitoring systems, 144 low intensity exhalations accompanied by steam were identified (image 1). Additionally, 36 explosions were recorded with light amounts of ash and volcanic gases (imagen 2) (imagen 3). In addition, three volcanotectonic earthquakes were detected today at 04:39, 06:06 and 07:06 h, with magnitude of 1.6, 1.7 and 1.54 respectively, and 10 minutes of low amplitude harmonic tremor.

During the night intense incandescence was observed above de crater (image 4) (image 5).

At the time of this report, we cannot see the volcano. But this morning we can see the continuous emission of volcanic gases in a westerly direction (image 6).

At the time of this report, there is no visibility, although earlier it was seen with a slight emission of steam and gas that the wind disperses to the west-southwest (image 7).

CENAPRED emphasizes that people SHOULD NOT go near the volcano, especially near the crater, due to the hazard caused by ballistic fragments (image 5) and in case of heavy rains leave the bottoms of ravines by the danger of landslides and debris flows.

The Volcanic Traffic Light Yellow Phase 2.

The scenarios foreseen for this phase are:

1. Explosive activity of low to intermediate level.

2. Ash fall in nearby towns.

3. Possibility of short range pyroclastic flows and mudflows .

Special emphasis is placed on the following recommendations:

1. Continue the safety radius of 12 km, so staying in that area is not allowed.

2. Keep the controlled traffic between Santiago Xalitzintla and San Pedro Nexapa through Paso de Cortés.

3. Civil Protection authorities, keep your preventive procedures, in accordance with their operational plans.

4. People, be alert to the official information disseminated.

In case of ashfall, address the following recommendations:

• Cover nose and mouth with a wet handkerchief or face mask.

• Clean eyes and throat with pure water.

• Avoid contact lenses to reduce eye irritation.

• Close windows or cover them up, and stay indoors as much as possible.

Popocatepetl Volcano monitoring is performed continuously 24 hours a day. Any change in activity will be reported in due course.

GVCJ


August 30, 2018: Volcano alert level unchanged, but I think it’s worth keeping an eye on and have set up this page, which is better for multiple updates.

Per CENAPRED this morning:

August 30, 11:00 h (August 30, 16:00 GMT)

In the last 24 hours, through the Popocatepetl volcano monitoring systems, 78 low intensity exhalations accompanied by water vapor and gas and a small amount of ash were identified (image 1). Additionally, two explosions were recorded today at 02:43 and 09:55 h (imagen 2). In addition, three volcanotectonic earthquakes were detected today at 03:18, 06:32 and 07:07 h, with preliminary magnitude of 1.8, 1.4 and 1.5, respectively, and 145 minutes of low amplitude harmonic tremor.

At the time of this report, there is little visibility of the volcano. If an ash emission were presented, it would have a west-southwest direction (image 3).

At the time of this report, there is no visibility, although earlier it was seen with a slight emission of steam and gas that the wind disperses to the west-southwest (image 4).

CENAPRED emphasizes that people SHOULD NOT go near the volcano, especially near the crater, due to the hazard caused by ballistic fragments (image 5) and in case of heavy rains leave the bottoms of ravines by the danger of landslides and debris flows.

The Volcanic Traffic Light Yellow Phase 2.

The scenarios foreseen for this phase are:

1. Explosive activity of low to intermediate level.

2. Ash fall in nearby towns.

3. Possibility of short range pyroclastic flows and mudflows .

Special emphasis is placed on the following recommendations:

1. Continue the safety radius of 12 km, so staying in that area is not allowed.

2. Keep the controlled traffic between Santiago Xalitzintla and San Pedro Nexapa through Paso de Cortés.

3. Civil Protection authorities, keep your preventive procedures, in accordance with their operational plans.

4. People, be alert to the official information disseminated.

In case of ashfall, address the following recommendations:

• Cover nose and mouth with a wet handkerchief or face mask.

• Clean eyes and throat with pure water.

• Avoid contact lenses to reduce eye irritation.

• Close windows or cover them up, and stay indoors as much as possible.

Popocatepetl Volcano monitoring is performed continuously 24 hours a day. Any change in activity will be reported in due course.

REP


August 29, 11:00 h (August 29, 16:00 GMT)

In the last 24 hours, through the Popocatepetl volcano monitoring systems, 112 low intensity exhalations were identified, accompanied by steam and gas (image 1).

Additionally, 47 minutes of low-amplitude tremor were recorded, three volcanotectonic seisms ocurred yesterday at 10:50, 18:36 and 21:18 h, with magnitudes of 2.0, 2.1 and 1.4, respectively. During the night visibility was limited, and slight incandescence could be perceived over the crater (image 2).

This morning the volcano has been visible, with an intermitent fumarole of steam and gases, which looks denser during the larger exhalations (image 3).

At the time of this report, there is no visibility, although earlier it was seen with a slight emission of steam and gas that the wind disperses to the west-southwest (image 4).

CENAPRED emphasizes that people SHOULD NOT go near the volcano, especially near the crater, due to the hazard caused by ballistic fragments (image 5) and in case of heavy rains leave the bottoms of ravines by the danger of landslides and debris flows.

The Volcanic Traffic Light Yellow Phase 2.


Original post (edited August 30, 2018):

They haven’t changed the status–tremor events like the one described in the CENAPRED bulletin (pasted below) happen around restless volcanoes. But I’ve been reading this article (it’s free, and the whole expert but nontechnical book on volcano hazards and communicating risk is worth downloading from Springer if you’re interested, or you can read it online).

It’s worth bringing this beautiful but dangerous volcano up again.


Per CENAPRED:

August 28, 11:00 h (August 28, 16:00 GMT)

In the last 24 hours, through the Popocatepetl volcano monitoring systems, 90 low intensity exhalations were identified, accompanied by steam and gas (image 1).

Additionally, 40 minutes of low-amplitude tremor were recorded, one volcanotectonic seism of magnitude 1.5 ocurred tonight at 00:57 h, and one explosion was detected, which could not be corroborated due to lack of visibility. During the night an intermitent fumarole was visible (image 2).

This morning the volcano has been visible, with an intermitent fumarole of steam and gases, which looks denser during the larger exhalations (image 3).

At the time of this report, there is no visibility, although earlier it was seen with a slight emission of steam and gas that the wind disperses to the west-southwest (image 4).

CENAPRED emphasizes that people SHOULD NOT go near the volcano, especially near the crater, due to the hazard caused by ballistic fragments (image 5) and in case of heavy rains leave the bottoms of ravines by the danger of landslides and debris flows.

The Volcanic Traffic Light Yellow Phase 2.

The scenarios foreseen for this phase are:

1. Explosive activity of low to intermediate level.

2. Ash fall in nearby towns.

3. Possibility of short range pyroclastic flows and mudflows .

Special emphasis is placed on the following recommendations:

1. Continue the safety radius of 12 km, so staying in that area is not allowed.

2. Keep the controlled traffic between Santiago Xalitzintla and San Pedro Nexapa through Paso de Cortés.

3. Civil Protection authorities, keep your preventive procedures, in accordance with their operational plans.

4. People, be alert to the official information disseminated.

In case of ashfall, address the following recommendations:

• Cover nose and mouth with a wet handkerchief or face mask.

• Clean eyes and throat with pure water.

• Avoid contact lenses to reduce eye irritation.

• Close windows or cover them up, and stay indoors as much as possible.

Popocatepetl Volcano monitoring is performed continuously 24 hours a day. Any change in activity will be reported in due course.

REP


IMG_20180828_111355_334


Featured image: Popocatépetl from Cholula, by Graham C99, CC BY 2.0.


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