Popocatépetl update

Update, 3:33 p.m. Eastern:

Well, Don Goyo is having another exhalation, per both the PPIG webicorder:

Servicio Sismológico Nacional

Servicio Sismológico Nacional

and the webcams, where anything can be seen (note plume in image below)

CENAPRED with arrow added.

CENAPRED with arrow added.

 

Of note, CENAPRED’s usual 11 a.m. Central update this morning didn’t mention continuous emission overnight.   Where the rest of us saw a steady plume, they identified separate events – in other words, this wasn’t a full-on eruption, but just some rather extreme “Popo puffing.”

Gives you an idea of what this volcano has shown itself capable of in the past.

Here is the update, mostly in English:

July 04 11:00 h (July 04, 16:00 GMT)

In the last 24 hours monitoring system Popocatepetl volcano registered 99 exhalations and tremor 12 hours of high and medium frequency and presence of incandescence. The most important exhalations with ash, steam and gas occurred yesterday at 11: 27, 17:17, 17:56, 18:38, 20:17, 20:32, 20:44 and 21:01 h (ver imagen 1), (ver imagen 2), (ver imagen 3), (ver imagen 4), (ver imagen 5), (ver imagen 6), (ver imagen 7), (ver imagen 8), and today at 01:26, 04:56 y a las 06:38 h (ver imagen 9), (ver imagen 10), (ver imagen 11).

Additionally 6 volcanotectonic events were recorded.

At the time of this report by cloudy conditions donn##t allow to see the crater of the volcano.

The Volcanic Alert Level is at Yellow, Phase 2.

CENAPRED places particular emphasis in the following recommendations:

1. Access is restricted within a radius of 12 km from the crater. Permanence in this area is not allowed.

2. The road between Santiago Xalitzintla (Puebla) and San Pedro Nexapa (Mexico State), including Paso de Cortes, is open only to controlled traffic.

3. To the authorities of Civil Protection, maintain preventive procedures, according to operative plans.

4. To the population, be aware of the official information emmited.

Popocatepetl Volcano is monitored continuously 24 hours a day.

Geologist Sergio Almazán ‏just tweeted that there are reports of ashfall on various parts of Mexico City. It’s not confirmed yet by CENAPRED but is in line with the graphic accompanying the current VAAC message:

Washington VAAC

Washington VAAC

 

 

*************************

Got a break at work and checked out the PPIG webicorder. Tremor has decreased quite a lot over the last few hours:

Servicio Sismológico Nacional

Servicio Sismológico Nacional

Too, the plume is still huge, so the mountain isn’t pressurizing. It’s pushing out mostly steam (white) at this time with only tiny amounts of ash (gray):

CENAPRED

CENAPRED

CENAPRED released the following statement this morning in English:

July 04 07:30 h (July 04, 12:30 GMT)

From 17:42 h the monitoring system of Popocatepetl has been registred a episode of tremor within middle amplitude, it has been accompanied by persistent issue of a column of gas and ash up to 3.5 km in height (see image). Likewise there has been the issue of incandescent fragments deposited a short distance from the crater on the northeast side.

There have been reports of a light ashfall in Amecameca, Mexico State. At the time of this update activity persists in the terms described above.

No change from last night, in other words. That’s very good!

Three cheers for monitoring!

The main argument for volcano monitoring (and it’s a good one) is that it is needed so we can have warning of eruptions. This episode, which I hope is winding down, also shows another important reason monitoring is important: It prevents panic.

There are millions of people around Popocatépetl and last night, at least on Twitter, a few were getting antsy and wondering why CENAPRED didn’t raise the alert. The scientists didn’t, presumably, because this activity falls within that expected during a Yellow, Phase 2, alert.

There is the assertion of rationality and order during activation of a natural hazard. Its importance can’t be overstressed.

Now, if we could get English-language North American journalism to move away from the sensationalism and focus more on education and informing the public about the hazards in their midst… .

Pretty pictures

Around dawn this morning, I took a work break and saved some webcam screen captures of the Colossus of Puebla from all 4 online webcams:

This slideshow requires JavaScript.

¡Qué lindo es!



Categories: volcanoes

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