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Warning of ‘insufficient monitoring’ as Gaua activity continues 8 October 2009

Posted by admin in activity reports, Gaua, Pacific, Vanuatu, volcano monitoring.
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Scientists monitoring the currently restless Gaua volcano in Vanuatu are relying on just one polyseismograph, leading a local seismologist to warn that insufficient monitoring is putting lives at risk:

We need back up for seismic monitoring because for the time being we have just one polyseismograph but we really need back up of two or three extra seismographs in order to locate the events.

The volcano remains on level one of the five-level alert system (where five is the highest level). Meanwhile, large earthquakes north-west of Vanuatu have shaken the area up, but with no tsunami or serious damage or loss of life. These were tectonic quakes which have no relation to the volcanic activity in Vanuatu, except in so far as both are products of subduction zone processes.

Seismologist says insufficient monitoring of Vanuatu volcano endangering lives – Radio New Zealand International, 8 October 2009

Global Volcanism Program: Gaua – summary information for Gaua (0507-02=)
Vanuatu volcanoes and volcanics – information from the USGS Cascades Volcano Observatory

The Volcanism Blog



1. mspelto - 9 October 2009

The extensive seismic activity in the area since 9/30 , is that related to the recent uptick here? I would not be surprised if at least did not shake up the conduit system.

2. admin - 11 October 2009

But would the ‘shake up’ be enough to make any significant difference to the conduit system, enough to provoke eruptive activity, particularly as the quakes are so distant from the volcanic centres? And the rise in activity at Gaua – not reflected at other Vanuatu volcanoes, which have remained quiet – pre-dates the recent rash of quakes.

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