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Fractures and smoke of the volcano Mount Agung in Indonesia 20 Oct.2017

Warning to approach Iwo crater at Kirishima volcano in Kyushu, Japan

Evolution of the fumarole field of Iwo crater between Dec 2015 and Feb 2016 (JMA)
 
A “near-crater” warning was issued for the volcano by JMA (Japan Meteorological Agency), in particular for the Iwo crater where an increase in seismic activity, fumarole temperatures and degassing (including poisonous H2S) in an area about 100×100 m wide has been observed over the past months. 
 
The observed signs of volcanic unrest are considered weak and no eruption is expected in the near future, but the risk of (always possible) sudden, steam-driven explosions, which could affect an area of up to 1 km radius, needs to be considered elevated. The site, a popular excursion destination and easily accessible by road, has been closed for public access now. A similar warning had already been issued in October 2014 and lifted again in May 2015.
Courtesy of volcanodiscovery.com

Colorful hot springs back to life at Dallol hydrothermal field in Ethiopia, Africa

Green lake at Dallol (image: Enku Mulugheta)
The hydrothermal activity was observed to be very intense, with many colorful ponds and hot springs. 
 
Expedition leader Enku reported: “Dallol is back to its original status with every bit of the geothermal fissures which are full of activity with gas and liquid chemicals washed out by the hot ground water. I have never seen Dallol like this before in my entire 12 years of Afar Depression trip.”
Courtesy of volcanodiscovery.com

Strong vulcanian explosion produces ash plume 5000m tall at Tungurahua volcano in Ecuador

Eruption plume of Tungurahua volcano yesterday (image: J.L Espinosa-Naranjo @Ambalaser / twitter)
Two moderately large explosions occurred at the volcano yesterday noon from 12:12 local time. The first and larger explosion produced an ash plume that rose approx. 5000 meters above the summit. 
 
The ash plume dispersed mainly to the west and northwest where ash fall occurred in areas including Choglontús, Pillate, Cahuaji and El Manzano. 
 
According to IGEPN, the eruption – which came after a 3 months interval of quiet since last November – was most likely NOT the result of new magma, but instead of accumulated gas pressure in the upper conduit. Magmatic gasses (H2O, CO2 etc) still contained in older magma inside the conduit was being released quietly as the magma continued to cool and crystallize, but most of these gasses were being trapped beneath a solid plug. With time, the gas pressure increased to the critical point: the plug gave way in yesterday’s explosions. 
 
The explosion itself, a typical so-called “vulcanian”-type eruption, was preceded only by a short (lasting little more than an hour), but intense seismic swarm of shallow earthquakes caused by internal fluid movements and rock fracturing as pressurized gasses started to disintegrate the overlying plug.
Courtesy of volcanodiscovery.com 

Japan’s Nishinoshima Volcano large sulfur emissions — Explosive eruption coming?

Is a larger explosive volcanic blast coming at Nishinoshima volcanic island in Japan?
 
The newest flyover video of Nishinoshima, released by the Japanese Coast Guard, shows major sulfur deposits around the main crater of the new volcanic island. Large amounts of sulfur dioxide gas must be the culprit behind the building yellow stains on the flanks of the cone.
 
This yellowish buildup is a new development over the past few months since the last flyover of the area. In light of the other building threat of large eruption in South Japan (at Sakurajima Volcano), this large buildup of sulfur must be made note of now.
 
The deposits are large enough to be visible from high above, and miles away.
 
The new volcanic island appeared out of the sea just a few years ago, and has grown rapidly over the past year, spreading out over a mile in width. 
 
Nishinoshima Volcano is located approximately 500 miles South of Tokyo Japan (on the Izu trench).
Credit: Japan Coast Guard: https://goo.gl/8WsTKV

Worrying signs as volcanic gas releases from sea floor at Sakurajima volcano in Japan

Inferometry map of Sakurajima showing large deformation (inflation) of the summit area
More worrying signs of volcanic unrest started to appear: according to FNN News, volcanic gas releases have been detected at the sea floor of the Futatsumata Port on the northern shore of Sakurajima peninsula
(located approx 4 km from summit).
Courtesy of volcanodiscovery.com

Undersea Volcano Called Kick ‘Em Jenny Rumbling off Grenada

Volcano Alert

An active underwater volcano off Grenada’s northern coast called Kick ’em Jenny was rumbling Thursday and regional disaster authorities were put on alert, though they said it posed no threat of triggering a destructive tsunami.
 
Since its discovery in the 1930s, Kick ’em Jenny has erupted beneath the surface of the Caribbean Sea at least 12 times, most recently in 2001. The volcano, which rises 1,300 meters (4,265 feet) above the seafloor on a steep slope of the Lesser Antilles ridge, hasn’t caused any known deaths or injuries.
 
The Seismic Research Center at the University of the West Indies said seismic activity had increased in the volcano, which sits 8 kilometers (5 miles) north of Grenada. Recreational divers have reported seeing some “degassing” on the seafloor off Grenada’s west coast as gas-rich magma bubbles.
 
Center researchers put the alert level at “orange,” which means an eruption could take place within 24 hours. An eruption would stir up high waves and heat surrounding waters to boiling temperatures. Scientists say the volcano can also shoot hot rocks up through the water column.
 
Under the alert, all boats must stay at least 5 kilometers (3 miles) from the volcano. Kick ’em Jenny poses the greatest threat to mariners since the gases it releases can lower the density of water so significantly vessels can lose buoyancy and sink.
 
Acting Prime Minister Elvin Nimrod said Kick ’em Jenny poses “no significant threat” to Grenada or other coastal communities on nearby islands for now.
 
“There is no need to move people away from coastlines,” he told reporters.
 
People were advised to go about their lives normally. But some were jittery as seismic activity ramped up, knocking out Internet service.
 
“People are just wondering what’s next,” said Kendel Mark, a resident of the outlying island of Carriacou.
 
In a 1939 eruption, Kick ’em Jenny shot a cloud of ash 270 meters (900 feet) above the sea surface. Its eruptions since then have been weaker.
Courtesy of abcnews.go.com

Strong SO2 steam emissions, some ash venting at Nevado del Ruiz volcano in Colombia

Unrest continues at the volcano. Strong steam emissions, sometimes mixed with light ash continue, accompanied by elevated seismic activity inside the volcano.
 
Manizales observatory reported several episodes of volcanic tremor associated with the movement of fluids and gases and ash emissions.
 
Additionally, tiny rock-fracturing earthquakes were recorded, located mainly under the southwestern, northern and northeastern parts of Arenas crater at depths between 1.8 and 8 km.
 
SO2 emissions remains high and the steam and ash plume reached up to 1500 m above the volcano’s summit.
Courtesy of volcanodiscovery.com

20 MILLION fish have died due to volcano eruption in Los Lagos, Chile

Fish Kill Alert

20 MILLION fish have died due to volcano eruption in Los Lagos, Chile

Nicaraguan volcano explodes with tourists next to crater

Nicaragua Volcano explosion
(Photo: La Prensa Nicaragua)
Dramatic footage has emerged from Nicaragua this week after visitors to Telica Volcano found themselves just feet away from its massive crater as it spewed dark clouds of ash and gas high into the sky.
 
According to the Nicaraguan Institute of Territorial Studies, which monitors seismic and volcanic activity, the country’s most-active volcano let out a first, loud explosion on Sunday.
 
Nearly 50 small gas and ash explosions together with seven micro-earthquakes have since been reported.
 
The three-thousand-475-foot volcano is located in rural area of Leon province in western Nicaragua.
 
According to media, nearby farming communities and homes were covered with ash and soot from Telica.
 
Authorities said there were no immediate reports of injuries or damage.
 
Although no evacuation order has been issued, authorities are bracing for possible escalation in volcanic activity.
 
Some 2,500people live near the massive volcano, located 69 miles northwest of the capital of Managua.
Courtesy of wbir.com