February 17, 2016. EN. Nishinoshima , Momotombo / Masaya / Telica , Nyamuragira , Piton de la Fournaise .
February 17, 2016.
Nishinoshima, Japan :
Volcanic activity seems to have abated and seabirds have immigrated to inhabit Nishinoshima island, south of Tokyo, an Asahi Shimbun aerial survey revealed Feb. 10.
Small columns of smoke were rising from the crater on the island in the Ogasawara island chain, about 1,000 kilometers south of the capital, but no volcanic eruption was confirmed.
The crater can be seen in the middle of Nishinoshima island in the Ogasawara island chain in this photograph taken Feb. 10 from an Asahi Shimbun aircraft. Volcanic activity appears to have abated at the island. (Naoko Kawamura)
In November 2013, a new islet was created beside Nishinoshima through underwater volcanic activity. The two later merged, increasing the size of the overall island.
On Feb. 10, the Asahi mission noted that white seabirds were occupying the plateau where the land surface remains the same as it was before the eruption, i.e., not covered in lava, but instead baring light green patches that appear to be grass.
Nishinoshima island on Feb. 10 with the crater rising up in the center (Naoko Kawamura)
No plants were confirmed in the area where new lava has solidified, but small dark-colored seabirds were spotted flying over it.
Small columns of smoke were seen billowing from along the rim of the crater and parts of the ocean surrounding the island were light brown.
According to the Japan Coast Guard, which observes Nishinoshima from the air every month, eruptions were not confirmed during a survey on Feb. 3.
The last recorded eruption was on Nov. 17, 2015, the coast guard said.
Source : Asahi.com
Photos : Naoko Kawamura
Momotombo / Masaya / Telica, Nicaragua :
An explosion took place at 13h05 yesterday, with emission of gases, ash and incandescent material, which were deposited on the slopes north and northeast of the volcano. The maximum height reached by the ash column was about 2,000 meters above the crater.
The micro-seismic activity of the volcano is relatively small. The RSAM values decreased significantly, being now below 100 units.
It maintains a high energy tremor with high RSAM values between 350 and 1,000 units, due to the strong movement of magma under the volcano and very near the surface.
At the moment, the volcanic gas emission is low and the lava lake is visible in the open mouth on the floor of the crater Santiago.
Regarding seismic activity, it was not recorded earthquakes.
According to the report of specialists from INETER, micro – seismicity remains high under the Telica volcano. This one is associated with fluid flow and small gas explosions.
There is a possibility of emergence of new gas explosions and volcanic ash, at any time, and even expulsion of fragments of hot rocks of different sizes.
It is recommended to tourists and people not to approach the volcano’s crater.
Source : Ineter
Photos : Canal6Nicaragua , La Prensa.
Nyamuragira, Democratic Republic of Congo :
Confirmation of the presence in February 2016 of a lava lake in Nyamuragira / RDC.
Georges Kourounis :We had one last chance to fly with the U.N. up to the second volcano (Nyamuragira)… The weather didn’t look good at first, it was raining and visibility was not good.
We had a South African crew, flying an Oryx helicopter, and they managed to get us up to the volcano and land. We spent about 4 hours there, observing the rarely-seen lava lake inside the deep crater.
The best part was the flight back, when the pilot let us do several spins around the crater with the doors open…. Then, we dashed back to Goma, flying extremely low and FAST, to avoid any rebel camps that have been spotted in the area. What a thrill. Here’s a pic from the chopper. More to come. »
Africa’s most active volcano, Nyamuragira, is a massive high-potassium basaltic shield about 25 km north of Lake Kivu. Also known as Nyamulagira, it has a volume of 500 cu km, and extensive lava flows blanket 1500 sq km of the western branch of the East African Rift. The broad low-angle shield volcano contrasts dramatically with its steep-sided neighbor Nyiragongo to the SW.
The 3058-m-high summit is truncated by a small 2 x 2.3 km caldera that has walls up to about 100 m high. Historical eruptions have occurred within the summit caldera, as well as from the numerous fissures and cinder cones on the flanks. A lava lake in the summit crater, active since at least 1921, drained in 1938, at the time of a major flank eruption. Historical lava flows extend down the flanks more than 30 km from the summit, reaching as far as Lake Kivu.
Source : B Duick, Georges Kourounis , GVP.
Photo : G.Kourounis / Furious Earth : « What a crazy day!! , Etat du monde.net ( 2011)
Piton de la Fournaise , La Réunion :
ACTIVITY RECORDED BY THE OBSERVATORY of the Volcano:
Since November 01 , 2015 The OVPF recorded
339 volcano-tectonic earthquakes summital,
67 deep earthquakes beneath the building,
57 local earthquakes (deep under the entire island)
3584 collapses in the Dolomieu crater,
an increase in inflation of the summit area since late January 2016,
a moderate increase in the flow of gas at distance and from the top since end of January, 2016.
In conclusion, we observed since late January 2016 an increase in certain indicators monitored by the OVPF . We know that the situation can change quickly at any time.
Source : OVPF.
Photo : Planetevivante.