|Etna. Photo: Barcroft Media|
May 13, 2015 – EARTH – The following constitutes the new activity, unrest and ongoing reports of volcanoes across the globe.
Etna (Sicily, Italy): Molten lava is seen spewing from Mount Etna in Sicily in this dramatic photo that captured one of the most active volcanoes on Earth acting up again.
The Strombolian activity – in which incandescent matter is propelled in relatively low-level eruptions – occurred at the New SE crater, according to volcanodiscovery.com.
The event, captured in the photo by Barcroft Media, was accompanied by a “rising tremor,” the site reported.
|Strombolian explosion at Etna’s New SE crater this evening (Radiostudio7 webcam)|
“The current pattern is very similar to many past episodes which often culminated in violent explosive (lava fountaining) and effusive (lava flow) paroxysms and could very well build up to a new one,” the site said.
Mount Etna is the largest and most active volcano in Europe, with frequent eruptions that are often accompanied by large flows of lava – though they rarely endanger inhabited areas.
The volcano, which towers above the city of Catania, has been erupting periodically for the past 2,000 years.
|Eruption plume from Sakurajima this evening.|
Ash plumes from these eruptions have been rising to 9-15,000 ft (2.7-4.5 km) altitude.
WATCH: Explosive eruption at Sakuraima.
Villarrica (Central Chile): Mild activity continues – a small lava lake remains active inside the vent of the inner summit crater producing steaming, small strombolian explosions, and related ash emissions.
|Lenticular cloud at Villarrica volcano this morning illuminated by the lava lake in the inner crater|
A lenticular cloud over the summit this morning was beautifully illuminated by the lava glow.
Kliuchevskoi (Kamchatka): Mild strombolian activity and associated ash emissions continue from the summit crater of the volcano.
|Glow and ash plume from Klyuchevskoy volcano May 9, 2015 (KVERT webcam)|
Tokyo VAAC reported an ash plume to 20,000 ft (6 km) altitude on 8 May.
Karangetang (Siau Island, Sangihe Islands, Indonesia): An increase in activity occurred during the past days, resulting in dangerous pyroclastic flows that swept 3 km down the steep southern slope of the volcano.
|Pyroclastic flow from Karangetang volcano on May 7, 2015 (Photo: Agustinus Hari)|
The cause was elevated strombolian activity combined with effusion of a viscous flow from the summit crater, which resulted in partial collapses of the lava flow.
People living in villages near the volcano were evacuated and it seems no fatalities occurred, although houses in the village of Kora Kora were destroyed by the pyroclastic flow on 7 May. Significant ash fall occurred on the northern flank of the volcano.
Batu Tara (Sunda Islands, Indonesia): An ash plume was seen yesterday on satellite imagery extending 45 nautical miles to the west.
Dukono (Halmahera): Intense ash emissions continue at the volcano. Darwin VAAC reported a plume at estimated 10,000 ft (3 km) altitude extending 40 km to the east.
Telica (Nicaragua): Several small explosions with ash emissions have occurred from the volcano’s summit vent since 8 May.
|Eruption at Telica on May 8, 2015 (Viva Nicaragua – Canal Trece / Facebook)|
8 explosions generated ash plumes up to 250 m height that drifted west causing light ash fall in the villages Quebranchal, Telica, Polvareda and Las Joyas.
Kilauea (Hawai’i): As the summit of Kilauea volcano continues to deflate, the lava lake is dropping out of view.
Over the past few weeks, the volcanic spectacle of the rising lava lake has been drawing thousands of visitors to Hawaii Volcanoes National Park, where for the first time the lava could be seen from the Jaggar Museum overlook. Before that, the lava could only be observed on USGS webcams stationed around Halema’uma’u crater.
The rise – and occasional overflow – of the lava lake coincided with a steep inflation at the summit, as recorded by continuously operating electronic tiltmeters. But this weekend, that inflationary trend reversed, and the lava lake began to recede.
Tiltmeters at the summit of Kīlauea continued to record a deflationary trend during the past 24 hours. The rate of deflationary tilt increased yesterday afternoon, which was accompanied by a higher frequency of earthquakes in the upper Southwest Rift Zone, including a magnitude 3.1 event at 3:40 pm. The lava lake continued to recede in the past day, and the surface was barely visible from Jaggar Museum early this morning. Seismicity remains elevated beneath Kīlauea’s summit and upper East and Southwest Rift Zones. Sulfur dioxide emission rates averaged 3,600-6,800 tonnes/day for the week ending May 5. – USGS Hawaiian Volcano Observatory on May 12.
|This USGS webcam view shows what the public sees at Jaggar Museum … no lava lake visible as of Tuesday afternoon|
The sudden deflation coupled with the increased seismicity has everyone on alert. The events could portend a change in the eruption. The National Park Service is taking the precaution of closing certain sections of the park to visitors at night.
|Screen grab from the USGS website “Recent Earthquakes in Hawaii”. We have placed the Legend for the map over the upper left portion of the image.|
Due to an increase in seismic activity along the East Rift Zone, all backcountry trails between Crater Rim Drive & the coast, as well as Kulanaokuaiki campground have been closed for overnight use. They remain open for day use. – Hawaii Volcanoes National Park.