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Volcanic activity worldwide 30 Dec 2013: Sinabung, San Miguel, Etna, El Hierro
Monday Dec 30, 2013 17:03 PM |
Weak lava fountain at the New SE crater
Violent strombolian activity from Etna's NSEC
GPS plots of stations in northern and western El Hierro (IGN)
Pyroclastic flow from Sinabung this evening (photo: #D_Lingga / Twitter)
Eruption plume from today's explosion at San Miguel (photo: La Prensa Grafica)
Etna (Sicily, Italy): The 21st paroxysm at the New SE crater which started last evening is still going on although it has decreased a bit. Until now, the eruption has been rather weak with no sustained tall lava fountains as during most of the paroxysms. Instead, the New SE crater continues to produce loud, spectacular near-continuous strombolian-type jets (or low, pulsating fountains) and explosions of lava bubbles. The eruption so far:
... [read more] ... [show less]
Over the course of the night, it has effused 3 lava flows towards the Valle del Bove:
...29 Dec: The 21st paroxysm at the New SE crater is in progress, but has still to reach its climax. At the moment, violent continuous strombolian explosions or low pulsating lava fountains occur at the summit vent and a lava flow has started to issue from the fissure vent on the SE flank of the cone.
El Hierro (Canary Islands, Spain): No new earthquakes have occurred, but deformation continues and shows that the current crisis is not yet over. A new pattern is slowly emerging: while the SE areas that experienced rapid uplift (presumably by magma accumulating beneath the crust in that area) are stagnating or even showing slight subsidence (El Pinar), the northern and western areas, in particular the western El Golfo depression have started to experience uplift. The strongest deformation occurred in Sabinosa (GPS station HI03) with ground uplift of almost 3 cm during the past 24 hours. Weak tremor continues also to be present on seismic signals from this area.
Sinabung (Sumatra, Indonesia): The growing lava dome has started to produce (extremely dangerous) pyroclastic flows, as parts of the unstable mass of the viscous lava have now overtopped the crater the dome had been growing inside. The first series of 3 flows apparently took place this morning at dawn on the southeast slope and reached up to 1.5 km length. More pyroclastic flows occurred at 17:22 and 18:36 local time, reaching maximum run-out lengths of approx. 2.5 km. Valleys radiating from the volcano should be avoided at all times in distances up to many kilometers. During Merapi's deadly eruption in 2010, some flows reached lengths of over 20 km.
San Miguel (El Salvador): (29 Dec) A new eruption began at the volcano this morning at 10:50 am local time. A strong vulcanian-type explosion produced an ash plume of unknown but considerable (several km) height. According to local press, ash fall was expected in the town of Chinameca and Civil Protection has begun evacuations of families residing in a radius of 3 km around the volcano.
Etna (Sicily, Italy): Activity is rapidly increasing towards the 21st paroxysm. The New SE crater produces near continuous bright strombolian explosions accompanied by loud explosion sounds. Tremor is rising steeply. ... [more]
El Hierro (Canary Islands, Spain): Although earthquakes have largely ceased for the moment, the island experiences ongoing rapid inflation and harmonic tremor, both signs that an eruption could be imminent. ... [more]
Merapi volcano photos: One of the most active and most dangerous volcanoes of Indonesia: Merapi meaning "the one who makes fire", is a feared but also venerated holy mountain looming over the city of Yogyakarta, capital of Central Java.
Volcanic Ash Advisory Centres: Much current eruption news is provided by the 9 Volcanic Ash Advisory Centres (VAAC) distributed around the globe. The VAACs provide a vital service for aviation safety.
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