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Volcanic activity worldwide 23 Jul 2014: Semeru, Askja, Santiaguito, Fuego, Reventador, Ubinas, Aso,...

Wednesday Jul 23, 2014 14:57 PM |

Glow at Aso's Nakadake crater this morning
Glow at Aso's Nakadake crater this morning
Glow from Semeru's summit at night (VSI webcam)
Glow from Semeru's summit at night (VSI webcam)
MODIS hot spots at Shishaldin (MODVOLC, Univ. Hawaii)
MODIS hot spots at Shishaldin (MODVOLC, Univ. Hawaii)
Current seismic activity (CEAP station / AVO)
Current seismic activity (CEAP station / AVO)
Tremor amplitude at Chaparrastique volcano over the past weeks (MARN)
Tremor amplitude at Chaparrastique volcano over the past weeks (MARN)
Small ash emission at Reventador yesterday
Small ash emission at Reventador yesterday
Gas plume from Ubinas with possibly some ash this morning
Gas plume from Ubinas with possibly some ash this morning
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.
There are no reports of victims.
Although there have been speculations that the slide could have been triggered by magmatic processes, it is most likely a result of summer warming, melting frozen soil in the caldera walls, destabilizing it.

Zhupanovsky (Kamchatka, Russia): Several small ash emissions occurred at the volcano during 16-21 July. The resulting plumes dissipated quickly. Aviation color code is at orange.

Aso (Kyushu): Activity remains elevated at Asosan volcano. Although no new ash emissions were reported recently, the Nakadake crater shows intense degassing and bright glow from hot fumaroles is visible at night. It seems that the crater lake which usually occupied the bottom of the crater has evaporated.

Semeru (East Java, Indonesia): Activity, weak during the past months, seems to have picked up. A new lava flow has started to slowly descend the southeastern slope.
Since the intense explosive phase of activity in February 2012, accompanied by pyroclastic flows down the southern slope, a lava dome has been growing slowly inside the breached summit crater. This dome now started to form a more or less coherent lava lobe that began descending through the notch onto the upper southern slope. Weak glow is visible at night.
... [read more]

Shishaldin (United States, Aleutian Islands): According to the Alaska Volcano Observatory, weak activity continues. MODIS data show elevated surface temperatures in the summit crater, but there are no visual or other indicators of eruptive activity available.

Semisopochnoi (United States, Aleutian Islands): Earthquakes have decreased but are still above background levels. No eruptive activity has been recorded. Alert level remains yellow.

Santiaguito (Guatemala): No explosions were observed since yesterday, but the lava flow at the eastern rim of the Caliente dome remains active, producing rockfalls into the Nima 1 river canyon. Strong degassing is occurring from the dome.

Fuego (Guatemala): No significant changes in activity have occurred at the volcano. The observatory reported 8 weak and one moderate strombolian-type explosion since yesterday.
Ash plumes rose up to 800 m above the crater, and produced avalanches of glowing material on the upper slope. No lava flow was active.

San Miguel (El Salvador): The volcano continues to produce important gas emissions as well as occasional small ash explosions. Tremor remains at very high levels (20 times above normal), caused by internal fluid movements. The likelihood of new eruptive activity in the near to medium future remains elevated.

Cerro Negro de Mayasquer (Colombia): Seismic unrest continues at the volcanic massif of Chiles and Cerro Negro. However, it decreased during the past week with less than 700 events recorded, compared to 1500-1800 per week during the month before.
Most earthquakes were associated with internal rock fracturing and located at shallow 1-7 km depth in an area 4 km SW of the Chiles dome. Magnitudes reached 2.7 and some quakes were felt.
Slight deformation has been detected at the Chiles dome as well.

Reventador (Ecuador): Intermittent small explosions continue as well as slow lava extrusion at the summit, evidenced by thermal hot spots visible on satellite data.

Ubinas (Peru): The volcano has been relatively calm over the past days, producing mostly a very weak gas plume with dilute ash, as well as sporadic small explosions.

Volcano Activity Summary for 23 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 15 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 30 Mar 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 16 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 23 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 23 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)
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)

Vorig nieuws
Perhaps the most interesting feature in the new crater at Puʻu ʻŌʻō is the pit formed on the southern side of the crater floor. There, a small lava pond roughly 10 m (~30 ft) across has been sporadically overflowing and sending lava toward the deeper central part of the crater. View is to the south.
Monday, Jul 21, 2014
Kilauea (Hawai'i): 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). ... [meer...]
Lava flow on Stromboli 17 July evening
Sunday, Jul 20, 2014
Stromboli (Eolian Islands, Italy): (20 Jul) Overall, activity remains similar. Several smaller and larger, but all short-lived lava overflows occurred from the second NE vent over the past days. ... [meer...]
Location and time vs depth of recent earthquakes under Katla volcano
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. ... [meer...]
This morning's lava flow on Stromboli
Tuesday, Jul 15, 2014
Stromboli (Eolian Islands, Italy): Another lava overflow from the NE vent occurred this morning, starting around 10:00 local time. It followed a phase of increased activity from the summit vents. ... [meer...]
Strombolian eruption from Stromboli's NE vent yesterday
Monday, Jul 14, 2014
Stromboli (Eolian Islands, Italy): Since 11 July, the volcano has been calmer compared to the previous weeks. No new lava overflows on the Sciara del Fuoco have occurred since 10 July, but who knows if a next surge of magma is already underway soon? ... [meer...]

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