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Volcanic activity worldwide 27 Mar 2013: Strong earthquakes at El Hierro, Etna still calm, eruptions at Colima

Mittwoch Mär 27, 2013 17:21 |

Today's seismic signal from Stromboli (ST8 station, INGV)
Today's seismic signal from Stromboli (ST8 station, INGV)
Map of recent quakes near Askja
Map of recent quakes near Askja
Map of recent earthquakes under Krafla volcano
Map of recent earthquakes under Krafla volcano
Current tremor signal (IGN)
Current tremor signal (IGN)
Current tremor signal (IGN)
Current tremor signal (IGN)
MODIS hot spot at the summit of Manam volcano (Univ. Hawaii)
MODIS hot spot at the summit of Manam volcano (Univ. Hawaii)
Current seismic signal from Colima volcano  (Soma station, Univ. Colima)
Current seismic signal from Colima volcano (Soma station, Univ. Colima)
SO2 plume from Popocatépetl (NOAA)
SO2 plume from Popocatépetl (NOAA)
Current seismogram from Telica volcano (TELN station INETER)
Current seismogram from Telica volcano (TELN station INETER)
This morning's seismic recording from San Cristobal volcano (CRIN station, INETER)
This morning's seismic recording from San Cristobal volcano (CRIN station, INETER)
Stromboli (Eolian Islands, Italy): It seems that activity has shifted a bit from effusive to explosive. The tremor signal has shown an increase today and includes very powerful explosion signals. On the other hand, lava overflows from the NE vent have decreased during the past days.

Etna (Sicily, Italy): 10 days since the last paroxysm, tremor is still low and doesn't suggest a new eruption is imminent. Bad weather mostly prevented observations during the past days. No glow could be seen last night from any of the summit craters.

Askja (Central Iceland): Small earthquakes have also been more frequent under and near the Askja caldera and Bardabunga volcano (to the SW of Askja) in the past few days.

Krafla (Northeastern Iceland): A weak swarm of earthquakes has occurred at Krafla over the past days.

El Hierro (Canary Islands, Spain): After a day of weakened activity, the seismic swarm has increased with higher energy tremor and stronger earthquakes than ever. Hundreds of earthquakes have occurred so far, including about 25 > magnitude 3 and no less than 4 above magnitude 4 (M4.1-4.6).
It seems plausible that magma has once again built up pressure and has broken new fractures into the low crust beneath the NW part of the volcanic edifice. Many quakes are now at 11-15 km depth, i.e. the epicenters, or the likely present location of the intruding magma, has perhaps started to rise. The likelihood of a new eruption in a possible near future thus once again increased.
...27 Mar:
The earthquake swarm has slowed down a bit, but continues with more than 70 quakes > magnitude 2 so far today, in a similar area as yesterday at depths mostly around 15 km. Tremor has weakened for the time being. This could either suggest that magma is currently stagnating and building up pressure (in which case a few stronger quakes could be expected) or that magma supply is slowly easing. It is certainly to early to draw any conclusions.

Manam (Papua New Guinea): A weak SO2 plume is visible today above Manam, indicating some ongoing activity. A hot spot at the summit is visible on MODIS data, likely indicating that a lava dome is growing there.

Paluweh (off Flores Island, Indonesia): Another ash plume was reported today rising to about 10,000 ft (3 km) altitude and drifting 20-30 nautical miles to the NE.

Colima (Western Mexico): Activity has continued to increase both internally and at the surface, with frequent explosions and glowing rockfalls and small pyroclastic flows traveling down the flank of the volcano.

Popocatépetl (Central Mexico): The rate of steam and sometimes ash emissions climbed to over 3 per hour yesterday. The larger emissions produced plumes with some ash content up to 1 km above the crater.
SO2 emission remains elevated.

Santa María / Santiaguito (Guatemala): Activity remains more or less unchanged, but relatively weak. The volcano observatory reported to have heard 5 explosions during the past night, and notes ongoing weak to moderate avalanches from the active lava flows on the flanks of the Caliente lava dome. Fine ash fall has again occurred in the fincas El Faro and La Florida.

Pacaya (Guatemala): Weak explosions producing small plumes of steam and some ash and degassing were reported this morning.

Fuego (Guatemala): Activity remains at weak levels, with 9 small to moderate explosions generating ash plumes rising up to 800 m above the crater and drifting W and SW where fine ash fall occurred.

Telica (Nicaragua): The earthquake swarm still continues and appears to show a slow trend towards increasing magnitude earthquakes including a magnitude 3 event two days ago.

San Cristobal (Nicaragua): A series of probably volcanic earthquakes of magnitudes between 2.8 and 4.9 shock the volcano during last Sunday evening (local time), and INETERS has increased monitoring of the volcano.
At the moment and during the past days, seismicity has remained low.

Volcano Activity Summary for 27 Mar 2013:

Currently erupting:

Ambrym (Vanuatu): active lava lakes in several craters (updated 22 Mar 2013)
Bagana (Bougainville Island, Papua New Guinea): occasional ash explosions (updated 25 Mar 2013)
Batu Tara (Sunda Islands, Indonesia): strombolian explosions, ash plumes up to 500 m, extrusion of a small lava dome with rockfalls (updated 26 Mar 2013)
Colima (Western Mexico): growing lava dome, small explosions (updated 27 Mar 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)
Etna (Sicily, Italy): Etna's New SE crater paroxysm - videos (updated 16 Mar 2013)
Fuego (Guatemala): strombolian explosions, lava flow on southern flank (updated 27 Mar 2013)
Gamalama (Halmahera): ash eruptions since 17 Sep (updated 17 Sep 2012)
Heard (Australia, Southern Indian Ocean): possible lava lake in summit crater (updated 26 Mar 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 21 Mar 2013)
Kizimen (Kamchatka): growing lava dome, lava flow on eastern flank, avalanches (updated 20 Mar 2013)
Lokon-Empung (North Sulawesi, Indonesia): frequent small to moderate ash explosions (updated 25 Mar 2013)
Manam (Papua New Guinea): steaming, occasional ash venting (updated 27 Mar 2013)
Nyiragongo (DRCongo): active lava lake in summit crater (updated 22 Mar 2013)
Ol Doinyo Lengai (Tanzania): spattering and lava flows of natrocarbonatite lava inside the summit crater (updated 9 Dec 2012)
Paluweh (off Flores Island, Indonesia): active growing lava dome (updated 27 Mar 2013)
Rabaul (Tavurvur) (New Britain, Papua New Guinea): ash emissions, small explosions (updated 14 Mar 2013)
Raung (East Java): mild strombolian eruption inside the crater (updated 8 Nov 2012)
Reventador (Ecuador): growing lava dome, lava flows on upper flank, frequent explosions (updated 26 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 Mar 2013)
Santa María / Santiaguito (Guatemala): advancing viscous active lava flows, weak occasional explosions (updated 27 Mar 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 20 Mar 2013)
Stromboli (Eolian Islands, Italy): strong strombolian explosions, intermittent small lava overspills (updated 27 Mar 2013)
Tinakula (Santa Cruz Islands, Solomon Islands): increased activity at the volcano (updated 8 Feb 2013)
Tolbachik (Kamchatka): effusion of fluid lava flows (updated 23 Mar 2013)
Yasur (Tanna Island, Vanuatu): strong strombolian activity (level 3), crater currently closed (updated 12 Mar 2013)

Eruption warning / minor activity:

Bezymianny (Central Kamchatka Depression): slow lava flow extrusion from dome (updated 10 Mar 2013)
Chirpoi (Kurile Islands, Russia): thermal anomaly at summit crater, steaming (updated 9 Jan 2013)
Dukono (Halmahera): thermal anomaly, probably small explosive activity in summit crater (updated 15 Mar 2013)
El Hierro (Canary Islands, Spain): seismic swarm since 18 March 2013 (updated 27 Mar 2013)
Galeras (Colombia): seismic unrest, occasional ash venting (updated 15 Mar 2013)
Gorely (Southern Kamchatka): strong steaming (updated 10 Mar 2013)
Grozny (Iturup Island): fumarolic activity (updated 20 Feb 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 27 Jan 2013)
Karymsky (Kamchatka): occasional small explosions, thermal anomaly (updated 10 Mar 2013)
Kirishima (Kyushu): degassing, slightly increased seismic activity (updated 30 Jul 2012)
Krakatau (Sunda Strait, Indonesia): strong degassing (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)
Medvezhia (Kurile Islands, Russia): strong steaming, thermal anomaly (updated 17 Jan 2013)
Nevado del Ruiz (Colombia): steaming, weak ash venting (updated 21 Mar 2013)
Nyamuragira (DRCongo): Fort dégazage du cratère sommital (updated 27 Apr 2012)
Pacaya (Guatemala): weak strombolian activity from Mackenney crater (updated 27 Mar 2013)
Pagan (Mariana Islands): steaming, thermal anomaly (updated 12 Dec 2012)
Popocatépetl (Central Mexico): steam and ash emissions (updated 27 Mar 2013)
Rasshua (Central Kuriles)
Rincón de la Vieja (Costa Rica): small phreatic eruption on 11 April (updated 6 Oct 2012)
Sabancaya (Peru)
Sacabaya (Northern Chile, Bolivia and Argentina)
Sangay (Ecuador): no recent explosions reported (updated 25 Feb 2013)
Soputan (North Sulawesi, Indonesia): new eruption on 18 (updated 9 Nov 2012)
Suwanose-jima (Ryukyu Islands): steaming, occasional weak eruptions, elevated seismicity (updated 23 Feb 2013)
Telica (Nicaragua): ongoing seismic swarm (updated 27 Mar 2013)
Tungurahua (Ecuador): steaming, small explosions and weak ash venting (updated 26 Mar 2013)
Turrialba (Costa Rica): vigorous steaming, occasional phreatic explosions (updated 17 Mar 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)
Cleveland (Aleutian Islands, Alaska): lava dome growing (updated 9 Mar 2013)
Concepción (Nicaragua): seismic unrest (updated 23 Jan 2013)
Copahue (Chile/Argentina): seismic swarms (updated 19 Feb 2013)
Cumbal (Colombia): continuing seismic swarms (updated 31 Jan 2013)
Dieng (Central Java): increased degassing (updated 14 Mar 2013)
Gamkonora (Halmahera): alert level lowered to yellow (updated 14 Sep 2012)
Gaua (Vanuatu)
Hakone (Honshu)
Hekla (Iceland): seismic unrest (updated 26 Mar 2013)
Ijen (East Java, Indonesia): increased steaming and seismicity, alert level raised on 24 July (updated 17 Apr 2012)
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 9 Mar 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 19 Mar 2013)
Masaya (Nicaragua): elevated seismic activity (updated 17 Mar 2013)
Mauna Loa (Big Island, Hawai'i)
Mayon (Luzon Island): steaming, increased earthquakes, slight inflation (updated 11 Nov 2012)
Merapi (Central Java): Dome collapse sometime in October (updated 21 Oct 2012)
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 31 Jan 2013)
Papandayan (West Java): alert status back to 2 (updated 1 Feb 2012)
Poas (Costa Rica): Small phreatic explosions on 29 October (updated 14 Mar 2013)
Reclus (Southern Chile and Argentina): increased number of earthquakes (updated 31 Aug 2012)
Rinjani (Lombok)
San Cristobal (Nicaragua): seismic unrest (updated 27 Mar 2013)
San Miguel (El Salvador): seismic unrest (updated 19 Mar 2013)
Sangeang Api (Indonesia): occasional weak steaming (updated 3 Jan 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 31 Jan 2013)
Soufriere Hills (Montserrat, West Indies (UK)): seismic unrest, occasional light ash venting (updated 21 Mar 2013)
Tahalra Volcanic Field (Algeria): 2 km deep volcanic earthquake on 14 february (updated 17 Feb 2013)
Talang (Sumatra)
Tiatia (Kunashir Island): weak thermal anomaly (updated 6 Sep 2012)
Tjörnes Fracture Zone (North of Iceland): continuing earthquake swarm (updated 1 Mar 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)
White Island (New Zealand): minor mud and steam explosions from the active crater (updated 26 Mar 2013)

Vorherige Nachrichten
Depth vs time of today's quakes under El Hierro
Dienstag, Mär 26, 2013
Hekla (Iceland): The Icelandic Meteorological Office has informed authorities about unusual seismicity at Hekla volcano, which could be a precursor to a new eruption, and increased the volcanic alert level to yellow. Monitoring of the volcano will be intensified, as Hekla is not only one of the most active, but also one of the potentially most hazardous volcanoes of the country. The last eruption was in March 2000. On average, the volcano has been erupting about every 10 years, and it would statistically seen be due for a new one. ... [mehr]
Current seismic signal (IGN)
Sonntag, Mär 24, 2013
El Hierro (Canary Islands, Spain): The earthquake swarm continues with little changes. Most epicenters have remained in an area at about 15-17 km depth a few km NW off the western tip of the island. Volcanic tremor, suggesting magma movements, is continuous with strong pulses every few hours. ... [mehr]
Webcam image of the crater area of Stromboli with dust from rockfalls on the Sciara (INGV)
Samstag, Mär 23, 2013
Stromboli (Eolian Islands, Italy): An increase in activity has occurred today. Lava overspills wide area of the rims of the NE crater, causing lava overflows and numerous rockfalls descending down the Sciara del Fuoco. ... [mehr]
Map of today's earthquakes at El Hierro
Freitag, Mär 22, 2013
El Hierro (Canary Islands, Spain): Earthquakes and tremor have continued through the day, and continued to migrate a bit to the NW off the NW tip of the island. So far, 62 quakes above magnitude 2 have been recorded today. ... [mehr]

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