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257 volcanic earthquakes in Mt. Kanlaon from August 23 to September 1

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posted on Sep, 5 2009 @ 12:55 PM
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BACOLOD CITY, Philippines—Kanlaon Volcano in Negros Occidental has shown a remarkable rise in its seismic activity for the last eight days.

The Philippine Institute of Volcanology and Seismology (Phivolcs) revealed in a bulletin Thursday that it has recorded 257 volcanic earthquakes in Mt. Kanlaon from August 23 to September 1.

The seismic activity was notably higher than the usual levels that generally vary from 0 to 4 events detected in 24 hours during quiet periods, Phivolcs said.

One of these quakes occurred at 5:26 p.m. on August 23, and was felt at Intensity 2 in Barangay Ara-al, La Carlota City.

Another tremor occurred at 10:27 p.m. on August 30 and was felt at Intensity 3 in La Castellana and Intensity 4 in the cities of La Carlota and Bago.

Phivolcs said the epicenters of the quakes were all located at the northwest slope of the volcano.

The occurrence of these earthquakes might indicate movements of an active local fault at the slope of the volcano, which might be induced by pressure beneath the volcano, it added.
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Since Kanlaon volcano has a history of sudden steam-driven explosions without precursors, Phivolcs reminded the public to refrain from entering the four-kilometer permanent danger zone.

Kanlaon Volcano shows restiveness

Here is the Wikipedia on Mount Kanlaon:

Kanla-on, variously referred to as Kanlaon Volcano and Mount Kanla-on (also spelled Canlaon), is an active volcano in the Philippines. A stratovolcano on Negros island, it straddles the provinces of Negros Occidental and Negros Oriental in the Visayas region (10°24.7'N, 123°7.9'E), approximately 36 kilometers southeast of Bacolod City.
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A 4-kilometre Permanent Danger Zone (PDZ) is maintained around the volcano, because sudden explosions may occur without warning.

Phivolcs continuously monitors volcanic activity at Kanlaon.


257 is an aweful lot of earthquakes for a 10 day period. Could we see an major eruption in the future?

What do our resident volcano and earthquake experts have to say on this matter?




posted on Sep, 5 2009 @ 01:15 PM
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Good find. Seeing that the volcano has a history of sudden outbursts, I would say it is a pretty good bet that we will see one soon. Interesting localization of the temblors...that thing is getting itchy, and needs a scratch.

The quakes could be from, as the article suggested, movement along fault lines, however, a build up of pressure from deep could be destabilizing the overlying strata. In any case, it would be an area to avoid.

I am not willing to hike, or helicopter, to the summit, just yet. I'd wait until it either blows, or quiets down considerably.



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