Volcanic activity worldwide 28 Dec 2013: Shiveluch, Suwanose-jima, Etna, El Hierro
Saturday Dec 28, 2013 17:03 PM |
Ash emission from Etna's NE crater this evening
Tremor amplitude yesterday (CTAB station, IGN)
Map of recent earthquakes; the magnitude 5.1 event this afternoon is the red dot west off the island.
Explosion from Shiveluch's lava dome this morning (afternoon in Kamchatka)
Etna (Sicily, Italy): The volcano remains restless. Ash emissions have resumed (or continue) at the NE crater. Tremor is fluctuating, but there's a slow overall rising trend.
Glow from Suwanose-jima volcano this evening
El Hierro (Canary Islands, Spain): The situation has been calm over night after yesterday evening's M5.1 earthquake (and a handful of aftershocks of magnitudes up to 3.6) off to the west. There are speculations that this quake might have been caused by magma rising in this area and hence, a possible precursor to an eruption west off the island, but the more likely interpretation, given by IGN's experts, is that the quake was a result of tectonic stress induced by the recent deformation of the island. Except abundant rockfalls and smaller landslides, the quake has not caused major damage or injuries, fortunately. Some local roads in the El Golfo area near steep cliffs have been closed.
On the island itself, the signs of volcanic unrest have decreased since yesterday afternoon: tremor, still present, has decreased in strength, earthquakes have been mostly absent under the central/SE part of the island, and deformation seems to be stagnating.
Whether this is a pause or sign of the near end of the current crisis is too early to say. You can check live data at: webcams.volcanodiscovery.com/elhierro.
IGN also lists the earthquake now, as a magnitude 5.1 event at 15 km depth NW off the island, i.e. on the western rift zone axis.
Shiveluch (Kamchatka): A relatively large explosive eruption occurred this afternoon at the lava dome of the volcano, producing a pyroclastic flow and an ash plume rising to over 27,000 ft (8 km) altitude (at 03:07 UTC):
Suwanose-jima (Ryukyu Islands): The volcano's activity has picked up. Today, VAAC Tokyo reported at least 3 explosions with low-level ash plumes. Bright glow from the crater area is visible at night, suggesting elevated strombolian to vulcanian-type activity. Here is a video of today's activity:
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