Volcanic activity worldwide 28 Jul 2014: Ibu, Reventador, Kilauea, Nishino-shima, Karangetang, Dukon...
Monday Jul 28, 2014 16:19 PM |
Nishinoshima on 23 July (image: Japanese Coast Guard)
MODIS hot spots at Karangetang volcano last week (MODVOLC, Univ. Hawaii)
MODIS hot spots at Ibu volcano (MODVOLC, Univ. Hawaii)
Explosive eruption at Halema'uma'u lava lake on 23 July
Summary of some of the most significant events during the past days:
Zhupanovsky (Kamchatka, Russia)
Pyroclastic flow from an explosion at Reventador on 26 July evening (IGPEN webcam)
: Intermittent eruptions continue. New ash emissions occurred yesterday from the volcano. VAAC Tokyo spotted an ash plume at estimated 28,000 ft (8 km) altitude drifting north on satellite imagery.
Nishino-shima (Volcano Islands)
: Activity at the growing island continues, perhaps even with increased intensity, judging from the recent pictures obtained by the Japanese Coast Guard on 23 July:
They show active lava flows reaching the sea and enlarging the island continuously, most notably towards the east, where a stretch of new land up to 250 m wide was added during only 1 month!
... [read more]
Karangetang (Siau Island, Sangihe Islands, Indonesia)
: An comparably small eruption occurred last week at the volcano. Incandescent lava avalanches were reported to descend from the summit lava dome to the SE, towards the area of Batu Awang, during 19-21 July.
It seems to have been a short-lived and relatively small event that did not form the feared pyroclastic flows (which Karangetang is notorious for): avalanches of gas-rich fresh lava that detaches from the dome and/or lava flows and turns into devastating hot turbulent flows that can reach many kilometers distance.
... [read more]
Ibu (Halmahera, Indonesia)
: New thermal signals have been detected recently coming from the northern rim of the volcano's summit crater, suggesting that the volcano has entered a phase of increased activity.
The rarely visited remote Ibu volcano has been in more or less continuous eruption since 1998, slowly growing a new lava dome as well as producing strombolian to vulcanian-type explosions, with significant variations in intensity. The new thermal signals, in the same area where glowing rockfalls had been reported last year, probably indicate that the (continued) lava extrusion has increased recently.
: Activity at the volcano continues to be elevated. VAAC Darwin frequently spots ash plumes from relatively strong strombolian to vulcanian activity.
: A piece of the crater walls of the Halema'uma'u lava lake collapsed on 23 July and triggered a small explosive eruption. Liquid spatter was ejected to the outer perimeter of the pit crater (including webcam position and the closed observation area) and an ash plume was generated.
The reason for the event was a sudden disturbance of the gas influx and release equilibrium of the lava lake induced by the rockfall, triggering a spontaneous and very strong degassing phase.
: Activity at the volcano has increased with more frequent small to moderately sized explosions from the growing lava dome in its summit. An explosion on the evening of 26 July generated a pyroclastic flow on the southwestern slope that reached almost 1 km length.
Seismic activity reflects frequent explosions and tremor, but visual observations are often not possible due to frequent cloud cover. IGPEN characterizes the activity as "moderate". The volcano's activity at the present does not pose a risk for the closest inhabited areas approx. 8 km away.
Volcano Activity Summary for 28 Jul 2014:
Currently erupting:Ambrym (Vanuatu)
: active lava lakes in several craters (updated 14 Aug 2013)Bagana (Bougainville Island, Papua New Guinea)
: ash explosions (updated 27 May 2014)Barren Island (Indian Ocean)
: intermittent activity, likely strombolian-type and/or lava flows (updated 4 Feb 2014)Batu Tara (Sunda Islands, Indonesia)
: strombolian explosions, ash plumes up to 500 m, extrusion of a small lava dome with rockfalls (updated 7 Jul 2014)Colima (Western Mexico)
: extrusion of lava flow from summit, intermittent explosions (updated 10 Apr 2014)Dukono (Halmahera)
: thermal anomaly, probably small explosive activity in summit crater (updated 28 Jul 2014)Erebus (Antarctica)
: active lava lake in summit crater (updated 21 Jan 2012)Erta Ale (Ethiopia)
: active lava lake in northern pit crater, active hornito with intermittend flow in southern crater (updated 11 Jan 2013)Fuego (Guatemala)
: strombolian explosions from summit crater, intermittent lava flows (updated 23 Jul 2014)Ibu (Halmahera, Indonesia)
: growing lava dome, occasional ash emissions (updated 28 Jul 2014)Kilauea (Hawai'i)
: new lava flow from vents on NE flank of Pu'u 'O'o (updated 13 Aug 2013)Lokon-Empung (North Sulawesi, Indonesia)
: small explosions, lava flow? (updated 25 Jul 2013)Manam (Papua New Guinea)
: degassing, occasional ash venting (updated 28 Aug 2013)Marapi (Western Sumatra, Indonesia)
: sporadic explosions (updated 27 Mar 2014)Nasu (Honshu)Nishino-shima (Volcano Islands)
: lava effusion enlarging the new island (updated 28 Jul 2014)Nyamuragira (DRCongo)
: lava lake in summit crater (updated 7 Jul 2014)Nyiragongo (DRCongo)
: active lava lake in summit crater (updated 26 Feb 2014)Ol Doinyo Lengai (Tanzania)
: effusion of natrocarbonatite lava inside the crater (updated 8 Jul 2013)Reventador (Ecuador)
: ash emissions, explosions (updated 28 Jul 2014)Sakurajima (Kyushu, Japan)
: ash venting, intermittent explosions (updated 16 Jul 2014)Sangeang Api (Indonesia)
: growing lava dome & lava flow (updated 7 Jul 2014)Santiaguito (Guatemala)
: generation of hot lahars (updated 23 Jul 2014)Semeru (East Java, Indonesia)
: growing lava dome & lava flow, sporadic explosions (updated 23 Jul 2014)Shiveluch (Kamchatka)
: growing lava dome, incandescent avalanches, occasional explosions (updated 7 Jul 2014)Sinabung (Sumatra, Indonesia)
: effusion of viscous lava, steaming, ash emissions (updated 15 Jul 2014)Slamet (Central Java)
: strombolian explosions from central crater (updated 4 Jul 2014)Stromboli (Eolian Islands, Italy)
: strombolian explosions from summit crater, intermittent lava flows (updated 20 Jul 2014)Suwanose-jima (Ryukyu Islands)
: strombolian activity in summit crater (updated 19 Jun 2014)Ubinas (Peru)
: degassing, sporadic small explosions and ash venting (updated 23 Jul 2014)Yasur (Tanna Island, Vanuatu)
: ash emissions, weak strombolian explosions (updated 14 Aug 2013)Zhupanovsky (Kamchatka, Russia)
: intermittent ash emissions (updated 28 Jul 2014)
Eruption warning / minor activity:Aso (Kyushu)
: occasional weak ash emissions (updated 23 Jul 2014)Bezymianny (Central Kamchatka Depression)
: steaming, weak seismic activity (updated 3 Jul 2014)Chirpoi (Kurile Islands, Russia)
: hot spot visible on satellite imagery (updated 1 May 2014)Etna (Sicily, Italy)
: new lava flow from vent at E base of NE crater (updated 19 Apr 2014)Heard (Australia, Southern Indian Ocean)
: possibly lava lake in summit crater (updated 27 May 2014)Karangetang (Siau Island, Sangihe Islands, Indonesia)
: lava extrusion at summit crater, strombolian activity, glowing avalanches (updated 28 Jul 2014)Karymsky (Kamchatka)
: occasional small explosions, thermal anomaly (updated 3 Jul 2014)Kavachi (Solomon Islands)
: no eruption since 2007 (updated 16 Jun 2014)Kelud (East Java)
: steaming, activity at crater unknown (updated 2 Mar 2014)Kerinci (Sumatra)
: seismic unrest (updated 5 Jun 2013)Krakatau (Sunda Strait, Indonesia)
: degassing (updated 31 Mar 2014)Medvezhia (Kurile Islands, Russia)
: strong steaming, thermal anomaly (updated 17 Jan 2013)Papandayan (West Java)
: strong hydrothermal activity, increased seismicity (updated 6 May 2013)Pavlof (Alaska Peninsula, USA)
: currently calm (updated 1 Jul 2014)Piton de la Fournaise (La Réunion)
: short-lived eruption during 21-22 June (updated 23 Jun 2014)Poas (Costa Rica)
: occasional small phreatic explosions, intense degassing (updated 23 Jun 2014)Popocatépetl (Central Mexico)
: degassing, sporadic explosions, slowly growing lava dome (updated 15 Jul 2014)Rabaul (Tavurvur) (New Britain, Papua New Guinea)
: weak ash explosions (updated 26 Aug 2013)Rasshua (Central Kuriles)Raung (East Java)
: strombolian activity in summit crater (updated 5 Aug 2013)Rincón de la Vieja (Costa Rica)
: small phreatic eruption on 11 April (updated 6 Oct 2012)Sacabaya (Northern Chile, Bolivia and Argentina)San Cristobal (Nicaragua)
: possible ash emission on 11 April (updated 12 Apr 2014)San Miguel (El Salvador)
: ash emissions, small explosions, increasing tremor (updated 23 Jul 2014)Sangay (Ecuador)
: degassing (updated 24 May 2013)Shishaldin (United States, Aleutian Islands)
: possibly lava fountaining episodes in summit crater (updated 23 Jul 2014)Soputan (North Sulawesi, Indonesia)
: degassing, seismic crisis, eruption warning (updated 1 May 2014)Ulawun (New Britain, Papua New Guinea)
: degassing, ash venting (updated 5 Aug 2013)
Wednesday, Jul 23, 2014
Askja (Central Iceland)
: A large landslide occurred from the southern wall of the Askja caldera yesterday night. The slide caused a large flood wave in the Öskjuvatn lake that also swept into the famous Viti crater. ...
Monday, Jul 21, 2014
: Kīlauea continued to erupt at its summit and within the East Rift Zone, and gas emissions in both areas remained elevated. There was no significant change in tilt recorded at the summit, and the lava lake level was relatively steady over the past week leveling at ~30m (98ft). ...
Wednesday, Jul 16, 2014
Katla (Southern Iceland)
: An increased number of small earthquakes, up to magnitude 2.7, has been occurring near the surface or at very shallow depths under Katla's ice cap since yesterday. ...