Augustin volcan (Alaska) - mise à jour éruption: l'augmentation du niveau d'alerte volcanique
jeudi janv. 01, 1970 01:00 |
AVO increased the Volcanic Alert Level to Advisory and the Aviation
Color Code to Yellow for Augustine on 22 September due to an increase
in seismic activity below the summit over the previous week. During
22-25 September, the earthquakes were generally less than M 1 and were
located at shallow depths beneath the summit.
jeudi, avril 11, 2013
Stromboli (Eolian Islands, Italy): Yesterday evening's lava flow has once again beeen very short-lived. Activity (effusion rate) sharply dropped late in the evening and today, only very small amounts of lava are still overspilling from the NE crater rim. Tremor and rockfall signals are much weaker as well. ... [details]
mercredi, avril 10, 2013
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