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Mayon: ‘minor ash explosion’ (updated) 28 October 2009

Posted by admin in activity reports, Mayon, Philippines.
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A ‘minor ash explosion’ occurred today at Mayon volcano, according to news reports from the Philippines. Phivolcs volcanologist Eduardo Laguerta told the Philippines Daily Inquirer that ‘one minor ash explosion occurred at the summit crater of Mayon volcano’ at 05:32 local time today, producing a brownish ash column that rose about 600 metres above the crater and drifted north-east.

Over the previous 24 hours 13 volcanic earthquakes were recorded. Steam emission was moderate, while sulphur dioxide emissions were measured at 250 tonnes/day, half the normal baseline level. Crater incandescence has been bright in recent days, but could not be observed overnight 27-28 October because of cloud.

UPDATE. Phivolcs has issued a bulletin about the 28 October ash explosion event at Mayon:

At 5:32 AM today, one minor ash explosion occurred at the summit crater of Mayon Volcano (13.2576 N, 123.6856 E). This event lasted for about one minute. The explosion produced a brownish ash column that rose to a maximum height of about 600 meters above the crater and drifted to the northeast. For the past 24 hours, the seismic network recorded thirteen (13) volcanic earthquakes. Steam emission was at moderate level creeping downslope towards southwest. Sulfur Dioxide (SO2) emission rate was measured yesterday at 250 tonnes/day. Crater glow was not observed last night due to poor visibility.

The alert level for Mayon remains at 2, but an increase in activity could lead to it being raised to level 3, which would mean the evacuation of about 30000 local residents.

For all our Mayon coverage: Mayon « The Volcanism Blog.

Mayon spews ash anewPhilippines Daily Inquirer, 28 October 2009

Global Volcanism Program: Mayon – summary information for Mayon (0703-03=)
Philippine Institute of Volcanology and Seismology – website for Phivolcs

The Volcanism Blog



1. Boris Behncke - 28 October 2009

While we have to wait for things to develop further at Mayon, we can now take a look at the Soufrière Hills volcano (Montserrat) in real time: the MVO (www.montserratvolcanoobservatory.info) is providing images from a monitoring camera. As of 17.58 h (time indicated in image frame) there’s quite some pyroclastic flow activity visible.

Web cam link: http://www.montserratvolcanoobservatory.info/index.php?option=com_content&view=article&id=729%3Avolcano-cam&catid=90%3Atechniques&Itemid=104&lang=en

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