Volcanic Activity Worldwide: April 18, 2016

Eruption of Santiaguito on 11 April 2016

Source: Volcano Discovery

Santiaguito (Guatemala): A violent explosion associated with a partial dome collapse occurred Monday morning at the Caliente dome. The eruption generated an ash column that rose several kilometers and a pyroclastic flow that traveled through the canyon draining from the dome complex to the SE.
Since this event, the dome has returned to normal activity with only occasional smaller explosions. Weak effusive activity continues to generate rock falls on the dome’s eastern flank.

Fuego (Guatemala): Another paroxysm (the 6th this year so far) started last night at the volcano. Intermittent strombolian explosions merged into lava fountaining reaching 400 m height and increased lava effusion has been feeding a lava flow that had reached 2 km length into the Las Lajas ravine (SE side).
In its bulletin this morning, INSIVUMEH reports strong tremor accompanying the rise of new magma. An ash plume has been rising to 5,500 m a.s.l. and drifting 25 km drifting to the S, SW and W, where ash fall is occurring. Strong shock waves from the explosions at the summit can be felt in several kilometer radius.
People in the area should avoid being near in or near river beds, particularly on the SE side, because of the likely occurrence of pyroclastic flows – glowing avalanches triggered by the partial collapse of the steep lava flow, which can reach several kilometers length and have been produced during most of the volcano’s recent similar eruptive phases.

Nyiragongo (DRCongo): The secondary vent remains active, a recent visit (on 8 April) at the volcano showed. Lava continues to be erupted from the side vent on the eastern crater floor and occasionally still cascades into the main pit with the active lava lake:

Alaid (Northern Kuriles): The eruption at the volcano continues as a strong thermal heat source remains active at the summit crater; no details about the nature of the activity (perhaps a small lava lake) are currently known.
Summary 1-8 April:
KVERT reported that moderate activity at Alaid continued during 1-8 April. Satellite images showed an intense daily thermal anomaly over the volcano. A gas-and-steam plume containing minor amounts of ash drifted about 40 km SW on 1 April. The Aviation Color Code remained at Orange (the second highest level on a four-color scale).

Chirpoi (Kurile Islands, Russia): Satellite images detected a thermal anomaly over Snow, a volcano of Chirpoi, during 4-5 and 7 April. The Aviation Color Code remained at Yellow.

Sakurajima (Kyushu, Japan): Over the past days, vulcanian-type explosions – mainly from Showa crater – have become weaker and less frequent; none have been recorded since Tuesday.
However, both Showa and Minamidake crater continue to show phases of continuous steaming/degassing with weak ash emissions, which in turn suggests probably deep-seated strombolian activity in both craters.
Summary from Smithsonian / USGS Weekly Volcanic Activity Report 6-12 April 2016:
JMA reported that during 4-8 April the seismic network at Aira Caldera’s Sakurajima volcano detected 4 explosions at Showa Crater, generating ash plumes that rose as high as 3.5 km above the crater rim.

Langila (New Britain, Papua New Guinea): Darwin VAAC reported that during 6-7 April ash plumes from the volcano rose to an altitude of 3 km (10,000 ft) a.s.l. and drifted 55 km NE and E. (Source: Smithsonian / USGS Weekly Volcanic Activity Report 6-12 April 2016)

Dukono (Halmahera): Strong ash emissions continue to be observed almost daily, suggesting that the volcano’s activity (continuous strong ash venting, intermittent strombolian explosions from its main crater) has not changed significantly over the past months.

Kerinci (Sumatra): Based on a pilot observation and reports from PVMBG, the Darwin VAAC reported that on 10 April ash plumes from Kerinci rose to altitudes of 4-4.3 km (13,000-14,000 ft) a.s.l. and drifted NE and E.
(Smithsonian / USGS Weekly Volcanic Activity Report 6-12 April 2016)

Popocatépetl (Central Mexico): The activity of the volcano has been relatively low during the past days, after the series of stronger explosions in early April had destroyed the previous lava dome. CENAPRED reported 74 weak emissions and one explosion over the past 24 hours.
Summary 6-12 April (Smithsonian / USGS Weekly Volcanic Activity Report 6-12 April 2016):
During 6-12 April there were 38-136 emissions from Popocatépetl and as many as six explosions detected daily; some emissions corresponded with increased crater incandescence.

Fuego (Guatemala): The 6th paroxysmal eruption of the volcano in 2016 ended already this morning, after having lasted approx. 24 hours only. The volcano’s activity returned to its typical style of intermittent weak to moderate strombolian explosions.
No pyroclastic flows were generated during this latest eruptive phase, INSIVUMEH reported.

Currently erupting:

Alaid (Northern Kuriles): intense thermal signal from summit crater, strong degassing (updated 31 Mar 2016)
Ambrym (Vanuatu): active lava lakes in several craters (updated 18 Feb 2016)
Aso (central Kyushu, Japan): degassing, sporadic steam / ash explosions (updated 8 Mar 2016)
Batu Tara (Sunda Islands, Indonesia): strombolian explosions, ash plumes up to 500 m, extrusion of a small lava dome with rockfalls (updated 28 Nov 2015)
Chikurachki (Paramushir Island): new eruption since end of March 2016 (updated 31 Mar 2016)
Colima (Western Mexico): sporadic small explosions (updated 31 Mar 2016)
Copahue (Chile/Argentina): seismic unrest, occasional ash venting (updated 22 Mar 2016)
Dukono (Halmahera): mild strombolian activity, continuous intense ash emissions (updated 21 Mar 2016)
Erebus (Antarctica): active lava lake in summit crater (updated 8 Dec 2014)
Erta Ale (Danakil depression, Ethiopia): overflowing lava lake (updated 2 Mar 2016)
Fuego (Guatemala): lava flows on S and W flanks, lava fountaining from summit vent (updated 11 Apr 2016)
Ibu (Halmahera, Indonesia): stromolian and phreatomagmatic explosions (updated 29 Oct 2015)
Karymsky (Kamchatka): occasional small explosions, thermal anomaly (updated 1 Mar 2016)
Kilauea (Hawai’i): new lava flow from vents on NE flank of Pu’u ‘O’o (updated 28 Apr 2015)
Kliuchevskoi (Kamchatka): mild strombolian activity in summit crater (updated 7 Apr 2016)
Masaya (Nicaragua): active lava lake in summit crater since mid Dec 2015 (updated 3 Apr 2016)
Momotombo (Nicaragua): intermittent vulcanian explosions (updated 29 Mar 2016)
Nevado del Ruiz (Colombia): intermittent explosions, steaming, ash venting (updated 31 Mar 2016)
Nyiragongo (DRCongo): new vent on crater floor (updated 8 Mar 2016)
Ol Doinyo Lengai (Tanzania): effusion of natrocarbonatite lava inside the crater (updated 8 Jul 2013)
Pacaya (Guatemala): intense spattering from intra-crater cone (updated 29 Mar 2016)
Popocatépetl (Central Mexico): degassing, sporadic explosions, slowly growing lava dome (updated 4 Apr 2016)
Rabaul (Tavurvur) (New Britain, Papua New Guinea): lava fountains, ash emissions from Tavurvur cone (updated 12 Sep 2014)
Reventador (Ecuador): lava flow on SW flank (updated 24 Feb 2016)
Sakurajima (Kyushu, Japan): sporadic vulcanian explosions from Minamidake and Showa crater (updated 8 Apr 2016)
Sangay (Ecuador): small strombolian activity in summit crater (updated 4 Apr 2016)
Santiaguito (Guatemala): intermittent explosions from Caliente dome, strong degassing (updated 13 Apr 2016)
Semeru (East Java, Indonesia): growing lava dome, lava flow, strombolian activity (updated 14 Feb 2016)
Shiveluch (Kamchatka): growing lava dome (updated 31 Mar 2016)
Sinabung (Sumatra, Indonesia): continuing pyroclastic flows (updated 31 Mar 2016)
Stromboli (Eolian Islands, Italy): weak, intermittent strombolian explosions (updated 31 Mar 2016)
Suwanose-jima (Ryukyu Islands): strombolian explosions in Ontake crater (updated 11 Apr 2016)
Tungurahua (Ecuador): large and frequent explosions, ash columns rising several km (updated 9 Mar 2016)
Ubinas (Peru): sporadic vulcanian explosions (updated 16 Jan 2016)
Villarrica (Central Chile): lava lake in summit crater, spattering, strombolian explosions (updated 4 Apr 2016)
Yasur (Tanna Island, Vanuatu): ash emissions, weak strombolian explosions (updated 13 Nov 2015)
Zhupanovsky (Kamchatka, Russia): steaming / degassing (updated 31 Mar 2016)

More continued coverage and updates at Volcano Discovery: Volcanic activity worldwide 18 Apr 2016

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