A small eruption was observed Wednesday on Mt. Asama in eastern Japan, prompting the volcanic alert level to be raised from 1 to 3 on a scale that goes up to 5, while there were no immediate reports of injuries, the weather agency and local authorities said.
The eruption occurred at 10:08 p.m. near the crater of the 2,568-meter-high volcano, with smoke reaching about 1,800 meters above the mountain, according to the Japan Meteorological Agency. The elevated alert level means people should not approach the mountain.
The agency warned of possible flying rocks and pyroclastic flows within about a 4-km radius of the crater.
At a press conference early Thursday, the agency said no pyroclastic flows had occurred in the latest eruption, while urging people to stay out of harm’s way by following instructions from local authorities.
The agency said the volcano spewed ash deposits as far as 200 meters from the crater, which is situated on the border between Gunma and Nagano Prefectures. The eruption lasted about 20 minutes.
Gunma’s Naganohara town office advised 28 people at a campsite at the foot of the mountain to evacuate. The site is located within the 4-km radius.
The town of Karuizawa in Nagano closed the starting points of two trails up Mt. Asama, located about 140 kilometers northwest of Tokyo.
Volcanic ash could fall on the three prefectures of Gunma, Nagano and Niigata, according to the agency.
The government set up a liaison unit at the crisis management center of the prime minister’s office after the eruption.
In June 2015, Mt. Asama experienced a small-scale eruption and the agency lowered the alert level from 2 to 1 in August last year.
Courtesy of english.kyodonews.net
Violent #Explosions With #Eruption Column Rising 2 km, Triggering #Panic At #StromboliVolcano In #Italy
View of the eruption column at Stromboli volcano (image: Francesca Utano / VolcanoDiscovery)
A series of at least two very large explosions occurred this afternoon at the volcano. They probably rank among the largest recorded at the volcanoes in decades.
At approx. 16:51, 16:54, and 17:03 local time, it seems that the the western (or otherwise the central) vent produced powerful eruptions (in particular the latter two), which ejected glowing bombs all over the summit area and produced an eruption column that rose approx. 3-5 km.
Hot bombs and lapilli falling in the vegetated slopes of the island caused a series of fires. Panic was reported to have broken out among some residents in the village of Ginostra (which is at only 2 km horizontal distance from the crater), but there are no reports of injuries.
A newspaper article mentioned that some tourists fled into the sea and there are talks about evacuation of the island, although the situation is not clear at the moment.
What is is clear is that this so-called paroxysm today was one of the largest events of its kind on the volcano not only during recent years, but decades. Fortunately, such sudden large explosions have been rare at Stromboli (on average one or two per year), but they not entirely unusual. Unfortunately, they are almost impossible to predict and pose a constant risk for anyone visiting the summit area.
According to local news, the eruption was preceded by an overflow of lava into the Sciara del Fuoco, which seems to have been associated with the first explosion at around 16:51 (see image), suggesting that they were the result of a sudden surge in magma supply.
Courtesy of volcanodiscovery.com