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Volcanic activity worldwide 27 May 2013: Popocatépetl, Gamkonora, Pavlov, Telica, Sabancaya

Monday May 27, 2013 15:05 PM |

Seismic recording from Telica this morning (TELN station, INETER)
Seismic recording from Telica this morning (TELN station, INETER)
The crater of Sabancaya volcano on 21 May 2013 (IGP)
The crater of Sabancaya volcano on 21 May 2013 (IGP)
Gamkonora (Halmahera): Increased earthquake activity has triggered an eruption alert by VSI, who raised the volcano's status to 3 ("Siaga", "warning") out of 4 this morning. Indonesian volcanologists reported that the degassing plume from the summit crater of the volcano has turned dark, which suggests the presence of ash (probably phreatic in origin) since 25 May.
The seismicity has shown significant changes with the appearance of harmonic tremor, low-frequency "tornillo" type-earthquakes (known from Galeras volcano in Colombia to often precede explosions). Volcanic-tectonic quakes (VA-type) related to rock fracturing have increased a lot, suggesting that magma at depth is intruding into new dykes.
... [read more]

Pavlov (Alaska Peninsula, USA): The eruption continues at low levels (both as surface lava emission and seismic activity).
AVO mentions that "during past eruptions of Pavlof, the style of eruptive activity fluctuated from higher to lower levels. Therefore, this apparent lower-level activity does not necessarily indicate that the eruption is ending. Although the activity to date has been characterized by relatively low-energy lava fountaining and ash emission, more energetic explosions could occur without warning that could place ash clouds above 20,000 ft.
... [read more]

Popocatépetl (Central Mexico): The volcano's activity has been reduced compared to a week ago, but still produces occasional explosions with plumes of up to 2 km in height, and many smaller emissions, accompanied by low-level harmonic tremor and a continuous steam plume rising about 1 km.
The Volcanic Alert Level remains at Yellow, Phase 3, and an exclusion zone of 12 km radius around the summit is in place.

Telica (Nicaragua): Seismic activity is on the increase again since about 24 May, but still far from the earthquake swarm earlier this year.

Sabancaya (Peru): The volcano has remained quiet, but is still showing signs of unrest. IGP scientists found evidence of eruptive activity (no fresh lava or pyroclastic deposits) inside the crater of of the volcano during a helicopter survey on 21 May. Only steaming and degassing were observed from the crater, that measures about 300-350 m in diameter and is 200 m deep.
2 major fumarolic areas are present in the N and SW sectors of the crater floor. Seismic activity is currently calm (as of 27 May), but occasional earthquake swarms still occur (such as on 21 May). Overall, a rise of volcano-tectonic quakes, likely related to new magma intrusions at depth, have been on the rise since early May.

Volcano Activity Summary for 27 May 2013:

Currently erupting:

Ambrym (Vanuatu): active lava lakes in several craters (updated 2 May 2013)
Bagana (Bougainville Island, Papua New Guinea): ash explosions (updated 25 May 2013)
Batu Tara (Sunda Islands, Indonesia): strombolian explosions, ash plumes up to 500 m, extrusion of a small lava dome with rockfalls (updated 6 May 2013)
Cleveland (Aleutian Islands, Alaska): continuous small eruptions (updated 6 May 2013)
Colima (Western Mexico): frequent explosions from growing lava dome, glowing rockfalls and small pyroclastic flows (updated 25 Apr 2013)
Dukono (Halmahera): thermal anomaly, probably small explosive activity in summit crater (updated 2 May 2013)
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): weak to moderate strombolian activity (updated 25 May 2013)
Gamalama (Halmahera): ash eruptions since 17 Sep (updated 17 Sep 2012)
Grozny (Iturup Island): fumarolic activity (updated 3 Apr 2013)
Heard (Australia, Southern Indian Ocean): possible lava lake in summit crater (updated 2 May 2013)
Karkar (Northeast of New Guinea): possible ash eruption on 1 February (updated 15 Mar 2013)
Kilauea (Hawai'i): lava lakes in Halemau'uma'u and Pu'u 'O'o, lava flows on coastal flat and weakly active ocean entries (updated 20 Apr 2013)
Kizimen (Kamchatka): growing lava dome, lava flow on eastern flank, avalanches (updated 19 May 2013)
Lokon-Empung (North Sulawesi, Indonesia): frequent small to moderate ash explosions (updated 6 May 2013)
Manam (Papua New Guinea): strombolian explosions, lava flow on southern flank (updated 16 Apr 2013)
Nyiragongo (DRCongo): active lava lake in summit crater (updated 20 Apr 2013)
Ol Doinyo Lengai (Tanzania): spattering and lava flows of natrocarbonatite lava inside the summit crater (updated 9 Dec 2012)
Pacaya (Guatemala): mild strombolian activity (updated 25 May 2013)
Paluweh (off Flores Island, Indonesia): active growing lava dome (updated 24 May 2013)
Popocatépetl (Central Mexico): strong degassing, ash explosions, growing lava dome (updated 27 May 2013)
Rabaul (Tavurvur) (New Britain, Papua New Guinea): ash emissions, small explosions (updated 14 Mar 2013)
Sakurajima (Kyushu, Japan): 0-3 weak to moderate vulcanian-style explosions per day, ash clouds up to 2-3 km altitude (updated 25 May 2013)
Santa María / Santiaguito (Guatemala): advancing viscous active lava flows, weak occasional explosions (updated 25 May 2013)
Semeru (East Java, Indonesia): growing lava dome, ash venting and small to moderate explosions (updated 25 Jul 2012)
Shiveluch (Kamchatka): slow dome growth, occasional explosions and pyroclastic flows (updated 19 May 2013)
Stromboli (Eolian Islands, Italy): continuing lava overflows (updated 25 May 2013)
Tinakula (Santa Cruz Islands, Solomon Islands): increased activity at the volcano (updated 8 Feb 2013)
Tolbachik (Kamchatka): effusion of fluid lava flows (updated 19 May 2013)
Yasur (Tanna Island, Vanuatu): strong strombolian activity (level 3), crater currently closed (updated 8 Apr 2013)

Eruption warning / minor activity:

Bezymianny (Central Kamchatka Depression): slow lava flow extrusion from dome (updated 10 Mar 2013)
Chirinkotan (Northern Kuriles): unspecified activity - possibly lava flows (updated 24 May 2013)
Chirpoi (Kurile Islands, Russia): thermal anomaly at summit crater, steaming (updated 9 Jan 2013)
Copahue (Chile/Argentina): ash venting, strong degassing (updated 26 May 2013)
Dieng (Central Java): increased degassing (updated 28 Mar 2013)
Etna (Sicily, Italy): ash emissions and strombolian activity at New SE crater (updated 24 May 2013)
Galeras (Colombia): sporadic ash emissions (updated 17 May 2013)
Gamkonora (Halmahera): seismic swam, minor ash emissions (updated 27 May 2013)
Gaua (Vanuatu): possible ash eruption on 29 april (updated 29 Apr 2013)
Gorely (Southern Kamchatka): strong steaming (updated 10 Mar 2013)
Ibu (Halmahera, Indonesia): Thermal anomalies indicate continuing eruption, possible lava dome growth (updated 18 Oct 2012)
Karangetang (Siau Island, Sangihe Islands, Indonesia): hot spot visible at the summit (updated 9 Apr 2013)
Karymsky (Kamchatka): occasional small explosions, thermal anomaly (updated 4 Apr 2013)
Kirishima (Kyushu): degassing, slightly increased seismic activity (updated 30 Jul 2012)
Krakatau (Sunda Strait, Indonesia): occasional explosions (updated 1 Oct 2012)
Langila (New Britain, Papua New Guinea): occasional ash explosions (updated 11 Feb 2013)
Marapi (Western Sumatra, Indonesia): intermittent mild ash explosions (updated 17 Mar 2013)
Mayon (Luzon Island): phreatic explosions (updated 7 May 2013)
Medvezhia (Kurile Islands, Russia): strong steaming, thermal anomaly (updated 17 Jan 2013)
Nevado del Ruiz (Colombia): sporadic ash emissions (updated 25 May 2013)
Nyamuragira (DRCongo): Fort dégazage du cratère sommital (updated 27 Apr 2012)
Pagan (Mariana Islands): steaming, thermal anomaly (updated 12 Dec 2012)
Papandayan (West Java): strong hydrothermal activity, increased seismicity (updated 6 May 2013)
Pavlov (Alaska Peninsula, USA): lava fountaining, lava flow on NW flank (updated 27 May 2013)
Poas (Costa Rica): Small phreatic explosions on 29 October (updated 1 May 2013)
Rasshua (Central Kuriles)
Reventador (Ecuador): growing lava dome, lava flows on upper flank, frequent explosions (updated 25 May 2013)
Rincón de la Vieja (Costa Rica): small phreatic eruption on 11 April (updated 6 Oct 2012)
Sacabaya (Northern Chile, Bolivia and Argentina)
Sangay (Ecuador): no recent explosions reported (updated 24 May 2013)
Sangeang Api (Indonesia): degassing, increased seismic activity (updated 21 May 2013)
Soputan (North Sulawesi, Indonesia): new eruption on 18 (updated 22 Apr 2013)
Suwanose-jima (Ryukyu Islands): steaming, occasional weak eruptions, elevated seismicity (updated 23 Feb 2013)
Turrialba (Costa Rica): ash venting, strong degassing (updated 22 May 2013)
Ulawun (New Britain, Papua New Guinea): ash emissions and rumblings heard (updated 23 Mar 2013)
Villarrica (Central Chile): weak deep-seated explosive activity, steaming (updated 20 Jan 2013)

Restless / uncertain activity:

Aoba (Vanuatu): minor phreatic activity from Lake Vui (updated 8 Feb 2013)
Askja (Central Iceland): increased seismicity (updated 27 Mar 2013)
Bárdarbunga (Iceland): earthquake swarm (updated 26 Jan 2013)
Barren Island (Indian Ocean)
Bromo (East Java, Indonesia): seismic unrest, steaming (updated 3 Oct 2012)
Campi Flegrei (Phlegrean Fields) (Italy): swarm of small earthquakes related to bradyseismus (updated 6 Feb 2013)
Chaitén (Southern Chile and Argentina)
Changbaishan (China / North Korea border): increased seismic and degassing activity, deformation (updated 29 Sep 2012)
Concepción (Nicaragua): seismic unrest (updated 14 Apr 2013)
Cumbal (Colombia): continuing seismic swarms (updated 16 May 2013)
El Hierro (Canary Islands, Spain): strong seismic swarm west of the island, inflation (updated 5 Apr 2013)
Guntur (West Java)
Hakone (Honshu)
Hekla (Iceland): strong inflation (updated 30 Apr 2013)
Ijen (East Java, Indonesia): increased steaming and seismicity, alert level raised on 24 July (updated 3 Apr 2013)
Irazu (Costa Rica)
Iwo-jima (Volcano Islands): weak degassing, occasional volcanic tremors (updated 22 Jan 2013)
Katla (Southern Iceland): occasional seismic swarms (updated 17 Aug 2012)
Kerinci (Sumatra)
Ketoi (Kurile Islands, Russia)
Kliuchevskoi (Kamchatka): weak seismic activity (updated 19 Mar 2013)
Kuchinoerabu-jima (Ryukyu Islands)
Kverkfjöll (Eastern Iceland): occasional small earthquake swarms (updated 21 Oct 2012)
Laguna del Maule (Central Chile): seismic unrest, deformation (updated 20 Apr 2013)
Lascar (Northern Chile): steam plumes with slight ash content (updated 14 Apr 2013)
Lewotobi (Flores): steaming and seismic activity decreased, alert lowered back to 1 (out of 4) (updated 5 Apr 2012)
Loihi (United States, Hawaiian Islands): Magnitude 4.2 earthquake at Loihi (updated 26 Nov 2012)
Machin (Colombia): elevated seismic activity (updated 16 May 2013)
Masaya (Nicaragua): elevated seismic activity (updated 17 May 2013)
Mauna Loa (Big Island, Hawai'i)
Merapi (Central Java): Dome collapse sometime in October (updated 21 Oct 2012)
Miyake-shima (Izu Islands)
Mt Fuji (Honshu): earthquakes at the end of January and in February 2012, new craters reported, increasing fumarolic activity (updated 4 Feb 2013)
Nevado del Huila (Colombia): degassing (updated 16 May 2013)
Raung (East Java): mild strombolian eruption inside the crater (updated 6 Apr 2013)
Reclus (Southern Chile and Argentina): increased number of earthquakes (updated 31 Aug 2012)
Rinjani (Lombok)
Ruapehu (North Island): seismic unrest (updated 13 Apr 2013)
Sabancaya (Peru): seismic unrest (updated 27 May 2013)
San Cristobal (Nicaragua): seismic unrest (updated 17 May 2013)
San Miguel (El Salvador): seismic unrest (updated 6 Apr 2013)
Sinabung (Sumatra, Indonesia)
Siple (Marie Byrd Land, Western Antarctica): possible steaming detected on 20 June (updated 28 Jun 2012)
Sirung (Pantar Island, Indonesia ): steaming and elevated seismicity (updated 27 May 2012)
Slamet (Central Java): degassing, strong fumaroles (updated 9 Aug 2012)
Sotará (Colombia): weak seismic unrest (updated 16 May 2013)
Soufriere Hills (Montserrat, West Indies (UK)): seismic unrest, occasional light ash venting (updated 21 Mar 2013)
Taal (Luzon, Philippines): degassing, elevated seismic activity (updated 6 Apr 2013)
Tahalra Volcanic Field (Algeria): 2 km deep volcanic earthquake on 14 february (updated 17 Feb 2013)
Talang (Sumatra)
Tambora (Sumbawa): aucune activité ces derniers mois, l'alerte est revenue à la normale (updated 6 Apr 2013)
Telica (Nicaragua): seismic unrest, occasional earthquake swarms (updated 27 May 2013)
Tiatia (Kunashir Island): weak thermal anomaly (updated 6 Sep 2012)
Tjörnes Fracture Zone (North of Iceland): continuing earthquake swarm (updated 8 Apr 2013)
To-shima (Izu Islands): seismic swarm (updated 10 Mar 2013)
Tongariro (North Island, New Zealand): strong steaming from Te Maari craters, slightly elevated seismic activity (updated 19 Feb 2013)
Torfajökull (Iceland): earthquake swarm (updated 17 Feb 2013)
Tungurahua (Ecuador): steaming, degassing (updated 25 May 2013)

Previous news
Sunday, May 26, 2013
Etna (Sicily, Italy): Etna today is free of clouds, but strong winds with gusts up to 70 km/h speed prevail. No further significant earthquakes occurred. The only activity remains degassing, and occasional small explosions, not visible, deep inside Bocca Nuova, based on seismic observations (OPEC). ... [more]
Explosion from the NE vent of Stromboli on the INGV webcam
Saturday, May 25, 2013
Stromboli (Eolian Islands, Italy): Activity continues at moderately elevated levels. Spectacular explosions especially from the NE crater can often be seen on the webcam as well. ... [more]
The plume of Chirinkotan volcano this morning (NASA/MODIS via Blog Culture Volcan)
Friday, May 24, 2013
Chirinkotan (Northern Kuriles): The remote volcano in the northern Kuriles is probably in eruption, the latest SVERT report and satellite images suggest. A plume of gas and steam, and possibly some minor amounts ash was seen with the MODIS sensor onboard the NASA Terra satellite this morning. ... [more]
Seismic trace of the 3.5 earthquake today (ESVO station, INGV Catania)
Thursday, May 23, 2013
Etna (Sicily, Italy): A shallow magnitude 3.5 earthquake occurred under the town of Zafferana, about 10 km east of the summit area this afternoon. ... [more]
Strombolian eruption from the NE vent (21 May 2013)
Thursday, May 23, 2013
Stromboli (Eolian Islands, Italy): Explosive activity at Stromboli is currently at normal to moderately high levels, but the magma column has obviously dropped considerably compared to previous weeks, as there are no longer lava overflows. We observed the volcano during the past days and found a total of 8 active vents in the crater terrace, out of which 4 were showing their typical different strombolian activity: ... [more]

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