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Volcanic activity worldwide 18-19 Jul 2013: Tungurahua, Sabancaya, Popocatepétl and more

Friday Jul 19, 2013 02:47 AM |

Map of recent earthquakes at Mt Churchill volcano in eastern Alaska
Map of recent earthquakes at Mt Churchill volcano in eastern Alaska
Map of recent quakes at the Long Valley caldera (California)
Map of recent quakes at the Long Valley caldera (California)
Aerial view of the crater of Popocatepetl on 15 July (CENAPRED)
Aerial view of the crater of Popocatepetl on 15 July (CENAPRED)
Moderate explosion from Santiaguito early on 18 July
Moderate explosion from Santiaguito early on 18 July
Current seismic recording at Telica (TELN station, INETER)
Current seismic recording at Telica (TELN station, INETER)
Seismic recording from San Cristobal volcano (CRIN station, INETER)
Seismic recording from San Cristobal volcano (CRIN station, INETER)
Current seismic recording from Turrialba volcano (VTUC station, OVSICORI)
Current seismic recording from Turrialba volcano (VTUC station, OVSICORI)
Last night's seismic signal from Tungurahua (RETU station, IGPEN)
Last night's seismic signal from Tungurahua (RETU station, IGPEN)
Recent earthquakes near Sabancaya volcano
Recent earthquakes near Sabancaya volcano
Churchill (United States, Eastern Alaska): A seismic swarm with magnitudes up to 3.5 has been occurring in the Wrangell Arc about 40 km NE of Mt. Churchill volcano during the past few days. The intensity and frequency of the quakes has calmed down yesterday.
While some few of the quakes are near the volcano, most are not, and the swarm is probably not linked to the volcanic system of Mt Churchill volcano.

Long Valley (California): Normal seismic activity with numerous tiny earthquakes continues to occur at the southern and western parts of the caldera as well as under Mammoth mountain. There are no signs of a possible eruption in a near future.

Colima (Western Mexico): Although the volcano is no longer making much news, a lava flow continues to effuse as a viscous flow on the upper eastern flank of the volcano (source: pers. communicataion).

Popocatépetl (Central Mexico): Activity has been comparably low with an average of 1-2 emissions of steam and gas, sometimes some ash, per hour during the past days. The strong explosion from 12 July has effectively destroyed the new lava dome, an aerial inspection via helicopter on 15 July showed.
In the past 24 hours, a number of volcanic-tectonic quakes have appeared, which could indicate that a new batch of magma is currently intruding, and lead to another phase of increased activity soon. The alert level remains unchanged at Yellow Phase 3.

Santa María / Santiaguito (Guatemala): Not much has changed in the generally weak activity. Occasional explosions, sometimes moderately large, occur at irregular intervals. One yesterday morning at 05:59 local time produced an ash plume of 700 m height and ash fall in areas to the SW. The lava flow on the southern flank of the dome remains active and produces small rock avalanches.

Pacaya (Guatemala): Mild strombolian activity from the Mackenney crater continues.

Fuego (Guatemala): The lava flow on the southern side has remained active and was about 250 m long this morning, producing near-constant rockfalls towards the Taniluya canyon.
At the summit, there are occasional strombolian explosions with incandescent material ejected to 100-125 m height above the crater.

Telica (Nicaragua): The swarm of small earthquakes continues with little changes over the past days.

San Cristobal (Nicaragua): Some elevated seismicity was recorded at the volcano during recent days and continues. This includes phases of harmonic tremor and long-period events.

Turrialba (Costa Rica): The seismic swarm continues but has decreased in strength during the past day.

Tungurahua (Ecuador): After the strong vulcanian explosion on 14 July, the volcano calmed down first, but resumed activity on 16 July which has been characterized by ash venting and small to moderate explosions and is continuing.
This activity was accompanied by the appearance of tremor and long-period earthquakes indicative of fluid movements. In addition, inflation is measured at the NW flank, suggesting that more magma is rising, and could lead to new powerful explosions similar to the one from last Sunday.
... [read more]

Sabancaya (Peru): A strong seismic swarm has occurred during the past days under the volcano, culminating in a magnitude 5.9 earthquake on 16 July. The swarm consisted almost entirely of volcanic-tectonic quakes, that relate to rock fracturing due to rapid pressure changes and might be caused by an intrusion of magma. IGP reports that up to 1500 earthquakes were recorded per day.
At the moment, the swarm still continues, but is decreasing. No changes of activity have been noticed at the surface. The number of long-period quakes (thought to correspond to internal movements of magma, gasses and other fluids) has remained low.

Volcano Activity Summary for 19 Jul 2013:

Currently erupting:

Ambrym (Vanuatu): active lava lakes in several craters (updated 5 Jul 2013)
Bagana (Bougainville Island, Papua New Guinea): ash explosions (updated 7 Jun 2013)
Batu Tara (Sunda Islands, Indonesia): strombolian explosions, ash plumes up to 500 m, extrusion of a small lava dome with rockfalls (updated 3 Jun 2013)
Cleveland (Aleutian Islands, Alaska): continuous small eruptions (updated 6 May 2013)
Colima (Western Mexico): lava flow on upper eastern flank (updated 19 Jul 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): strombolian activity, new lava flow on upper southern flank (updated 19 Jul 2013)
Gamalama (Halmahera): ash eruptions since 17 Sep (updated 17 Sep 2012)
Grozny (Iturup Island): fumarolic activity (updated 3 Apr 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 5 Jul 2013)
Kizimen (Kamchatka): growing lava dome, lava flow on eastern flank, avalanches (updated 16 Jul 2013)
Nyiragongo (DRCongo): active lava lake in summit crater (updated 12 Jun 2013)
Ol Doinyo Lengai (Tanzania): effusion of natrocarbonatite lava inside the crater (updated 8 Jul 2013)
Pacaya (Guatemala): weak to moderate strombolian activity (updated 19 Jul 2013)
Paluweh (off Flores Island, Indonesia): active growing lava dome (updated 20 Jun 2013)
Popocatépetl (Central Mexico): near continuous explosions (updated 19 Jul 2013)
Rabaul (Tavurvur) (New Britain, Papua New Guinea): ash emissions, small explosions (updated 14 Mar 2013)
Reventador (Ecuador): steam and ash emissions (updated 17 Jul 2013)
Sakurajima (Kyushu, Japan): constant ash emissions and strong explosions (updated 18 Jul 2013)
Santa María / Santiaguito (Guatemala): Santiaguito volcano (Guatemala): lava flow on south flank of dome becomes more active (updated 19 Jul 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 5 Jul 2013)
Stromboli (Eolian Islands, Italy): continuing lava overflows (updated 6 Jun 2013)
Tinakula (Santa Cruz Islands, Solomon Islands): increased activity at the volcano (updated 8 Feb 2013)
Tolbachik (Kamchatka): effusion of fluid lava flows (updated 14 Jul 2013)
Tungurahua (Ecuador): ash venting, intermittent explosions (updated 19 Jul 2013)
Veniaminof (Alaska Peninsula, USA): effusion of lava flows (updated 18 Jul 2013)
Yasur (Tanna Island, Vanuatu): strong strombolian activity (level 3), crater currently closed (updated 29 May 2013)

Eruption warning / minor activity:

Bezymianny (Central Kamchatka Depression): slow lava flow extrusion from dome (updated 10 Jun 2013)
Chirinkotan (Northern Kuriles): unspecified activity - possibly lava flows (updated 8 Jul 2013)
Chirpoi (Kurile Islands, Russia): hot spot visible on satellite imagery (updated 14 Jul 2013)
Copahue (Chile/Argentina): degassing, weak sporadic ash emissions (updated 7 Jul 2013)
Dieng (Central Java): increased degassing (updated 28 Mar 2013)
Etna (Sicily, Italy): steaming, degassing (updated 3 Jul 2013)
Galeras (Colombia): sporadic ash emissions (updated 5 Jul 2013)
Gamkonora (Halmahera): seismic swam, minor ash emissions (updated 27 May 2013)
Gaua (Vanuatu): possible ash eruption on 29 april (updated 29 Apr 2013)
Heard (Australia, Southern Indian Ocean): possible lava lake in summit crater (updated 8 Jul 2013)
Ibu (Halmahera, Indonesia): growing lava dome, seismic unrest (updated 9 Jun 2013)
Iwo-Tori-shima (Ryukyu Islands): possible small ash eruption on 6 July 2013 (updated 6 Jul 2013)
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)
Kerinci (Sumatra): occasional ash explosions (updated 5 Jun 2013)
Kikai (Ryukyu Islands): steaming at summit crater of Iodake, occasional weak glows (updated 5 Jun 2013)
Kirishima (Kyushu): degassing, slightly increased seismic activity (updated 30 Jul 2012)
Krakatau (Sunda Strait, Indonesia): occasional explosions (updated 27 Jun 2013)
Langila (New Britain, Papua New Guinea): occasional ash explosions (updated 11 Feb 2013)
Lokon-Empung (North Sulawesi, Indonesia): steaming, degassing, occasional ash explosions (updated 14 Jul 2013)
Manam (Papua New Guinea): strombolian explosions, lava flow on southern flank (updated 25 Jun 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)
Merapi (Central Java): slowly growing lava dome, occasional small explosions (updated 15 Jun 2013)
Nevado del Ruiz (Colombia): occasional ash venting (updated 20 Jun 2013)
Nyamuragira (DRCongo): steaming/degassing from pit inside summit caldera (updated 18 Jul 2013)
Papandayan (West Java): strong hydrothermal activity, increased seismicity (updated 6 May 2013)
Poas (Costa Rica): Small phreatic explosions on 29 October (updated 1 May 2013)
Rasshua (Central Kuriles)
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)
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)

Vorig nieuws
Current seismic recording from Veniaminof (VNHG station, AVO)
Thursday, Jul 18, 2013
Sakurajima (Kyushu, Japan): Activity has remained at very high levels, as if the volcano greets the scientific community arriving from all over the world for the 20-24 July IAVCEI conference. During yesterday and the day before, at least 14 explosions were recorded, many of which of moderate to large size with ash plumes up to 15,000 ft (4.5 km) altitude. ... [meer...]
Wednesday, Jul 17, 2013
Reventador (Ecuador): The IG reported that in the last few days, increased seismic activity indicative of increased eruptions has been noticed at the volcano. Seismic data also indicated the presence of a lava flow travelling down the SW slope of Reventador's intracaldera cone. ... [meer...]
Tuesday, Jul 16, 2013
Kizimen (Kamchatka): On 15 July, ash plumes were observed drifting 20 nautical miles NW from Batu Tara. ... [meer...]
Explosion from Sakurajima late on 14 July 2013
Monday, Jul 15, 2013
Sakurajima (Kyushu, Japan): The volcano remains in a state of elevated activity. Ash emission and explosions have been occurring with no break when observed from nearby during the past night: ... [meer...]
Location of quakes during the past 2 weeks (IGN)
Sunday, Jul 14, 2013
El Hierro (Canary Islands, Spain): (14 Jul) Small clusters of earthquakes continue to occur in two areas, at 10-20 km depth, one located beneath the central area of the island and the second under an area off the western tip. Overall, seismic activity has remained low and shows a decreasing trend over the past months. ... [meer...]

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