Roundup of Global Volcanic Activity

Etna (Sicily, Italy): After the third paroxysmal phase (tall lava fountaining) at the Voragine yesterday evening around 22:00, activity in the form of strong, frequent strombolian explosions and lava spattering continued all night and into the morning. Tremor remains high, suggesting that the current phase is in fact not over (and more paroxysm could occur). Small incandescent ejections and ash emissions also take place from the small new pit crater on the upper eastern flank of the New SE crater. After only about 12 hours since this morning’s lava fountaining episode, another paroxysm occurred this evening. Activity from the Voragine (and minor activity from New SE crater) had in fact not ceased at all after the peak of the paroxysm this morning, but remained with intense strombolian explosions and ash emissions. Tremor had remained elevated.

Rinjani (Lombok): The volcano continues to erupt, but activity has decreased a lot. When visited during 30 Nov – 2 Dec, “the volcano erupted just 2-3 times eruption per day”, but some explosions were fairly big.

Bromo (East Java, Indonesia): An eruption warning was issued this morning – PVMBG raised the volcano’s alert status to “siaga” (alert), or 3 on a scale of 1-4. Seismic activity and degassing from the crater have sharply increased, suggesting that a new eruption could occur any time at the volcano.

Telica (Nicaragua): The volcano has calmed down, at least at the surface during the past week. Since 29 Nov, no more significant explosions / ash emissions have taken place. Whether this is in connection with the new eruptive activity at neighbouring Momotombo volcano or pure coincidence is up to speculation.

Momotombo (Nicaragua): Activity at the volcano continues, but at lower intensity than during the first days of the new eruption. Strombolian explosions at the summit crater accompany the emission of a steam-ash plume rising up to approx. 1000 m, an possibly still continued, but very weak lava flow extrusion. After the more vigorous onset of the eruption on 2 Dec, the new lava flow had reached the base of the summit cone by next morning, where it had branched into two lobes.

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