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El Hierro Volcano : Red alert – 20 minutes of very strong harmonic tremor tonight

December 6, 2011

Update  06/12 – 23:44UTC
– The rotten egg odor has also been confirmed by AVCAN followers. See the H2S values measured tonight in real time at the La Restinga analysis container station.   The current levels of H2S are reaching the lower alert levels if the current values are continuing to be measured for several hours (which we do not think).

Contaminantes de la estación U.Movil 3- La Restinga-El Hierro – courtesy Gobierno de Canarias

– The coincidence of the high H2S levels with the very strong harmonic tremor has to be looked at. A pity we could not see the Las Calmas sea at night. They might have been triggered by a very strong Jacuzzi activity.
– The picture below shows a very long lasting burst of activity that started at 21:26 UTC and lasted for about 20 minutes. The signal decreased gradually thereafter but stayed stronger than before the burst
2 earthquakes today with epicenter in the El Golfo Bay.

Harmonic tremor image December 6 from 21:00 until 22:00 – image courtesy IGN

El Hierro Volcano : Red alert – 20 minutes of very strong harmonic tremor tonight.

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