Source: Volcano Discovery
Etna (Sicily, Italy): Over the past weeks, the volcano’s activity (at Voragine and the New SE crater) has generally decreased and tremor levels are currently low.
While not entirely stopped, the emissions of hot incandescent gasses and ash, along with weak strombolian activity from the new vent in the Voragine crater have become less pronounced. Similarly, the sporadic ash emissions from the New SE, observed intermittently until at least Saturday, have ceased or become even rarer.
This could rapidly change, however.
Katla (Southern Iceland): At least one earthquake of magnitude 4.5 occurred this morning under the volcano, the strongest recorded for Katla in recent decades. It was felt in nearby areas.
The Icelandic Met Office (IMO) reported two quakes, one at 01:47:02 local time at 3.8 km depth 8.1 km east of the summit (Goðabunga) followed 20 seconds later by another magnitude 4.5 quake at 0.1 km depth. Caution is required as these data are from automatic calculations which could actually in fact describe only one quake.
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During the past 48 hours, IMO has detected 48 earthquakes – most of them tiny, but including 4 of magnitudes of 3 or higher – at shallow depths under Katla.
Klyuchevskoy (Kamchatka): The activity of the volcano, mainly effusive, remains intense. There are currently 3 active lava flows descending the steep stratovolcano: two parallel ones on the eastern-southeastern flank and a new one on the upper southwestern slope which has appeared about a week ago.
An intense thermal anomaly corresponding to the large output of lava is visible on satellite data.
Small ash plumes from strombolian activity in the summit crater have been producing plumes today that reached 20,000 ft (6 km) altitude and drifted eastwards today.
Bagana (Bougainville Island, Papua New Guinea): Low-level ash emissions occur at the volcano, producing a plume at estimated 7,000 ft (2.1 km) altitude drifting west from the volcano.
The latest Terra satellite image shows a narrow plume of mostly gas and possible light ash content extending about 70 km to the west of Bougainville Island.
A moderate thermal hot spot is visible on MODIS data and has increased recently. This suggests that the volcano’s activity (effusive or mildly explosive or both) has picked up recently.
Copahue (Chile/Argentina): Strombolian activity continues in the El Agrio crater at fluctuating, generally low intensity.
Occasionally, incandescent bombs are projected higher than the crater rim and small ash plumes rise up to a few hundred meters before dissipating.
Ambrym (Vanuatu): active lava lakes in several craters (updated 12 Jul 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)
Bromo (East Java, Indonesia): intermittent mild ash emissions (updated 2 Aug 2016)
Chikurachki (Paramushir Island): ash emissions since 18 Aug 2016 (updated 19 Aug 2016)
Colima (Western Mexico): intermittent mild to moderate explosions (updated 14 Aug 2016)
Copahue (Chile/Argentina): strombolian activity from new intra-crater cone (updated 4 Jul 2016)
Dukono (Halmahera): mild strombolian activity, continuous intense ash emissions (updated 14 Aug 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 30 Jul 2016)
Gamalama (Halmahera): small ash eruption on 3 Aug 2016 (updated 5 Aug 2016)
Ibu (Halmahera, Indonesia): stromolian and phreatomagmatic explosions (updated 29 Oct 2015)
Kilauea (Hawai’i): new surface lava flows from breakouts N and NE of Puu Oo since 24 May 2016 (updated 28 Apr 2015)
Klyuchevskoy (Kamchatka): strombolian explosions in summit crater, active lava flows on SE flank (updated 10 Aug 2016)
Masaya (Nicaragua): active lava lake ini summit crater (updated 12 Jul 2016)
Nevado del Ruiz (Colombia): intermittent mild to moderate ash emissions (updated 29 Jul 2016)
Nevados de Chillán (Central Chile): sporadic ash emissions (updated 10 Aug 2016)
Nyiragongo (DRCongo): new vent on crater floor (updated 1 Jun 2016)
Ol Doinyo Lengai (Tanzania): effusion of natrocarbonatite lava inside the crater (updated 8 Jul 2013)
Pacaya (Guatemala): strombolian explosions (updated 29 Jul 2016)
Popocatépetl (Central Mexico): degassing, sporadic explosions, slowly growing lava dome (updated 14 Aug 2016)
Reventador (Ecuador): lava flow on SW flank (updated 8 Aug 2016)
Sakurajima (Kyushu, Japan): sporadic vulcanian explosions from Minamidake and Showa crater (updated 25 Jul 2016)
Sangay (Ecuador): mild strombolian activity in summit crater (updated 20 May 2016)
Semeru (East Java, Indonesia): growing lava dome, mild strombolian activity in summit crater (updated 29 Jul 2016)
Shiveluch (Kamchatka): growing lava dome (updated 14 Aug 2016)
Sinabung (Sumatra, Indonesia): continuing pyroclastic flows (updated 8 Aug 2016)
Stromboli (Eolian Islands, Italy): weak, intermittent strombolian explosions (updated 23 May 2016)
Suwanose-jima (Ryukyu Islands): steaming, occasional ash emissions from On-take crater (updated 17 Aug 2016)
Turrialba (Costa Rica): near-continuous ash emissions (updated 25 Jul 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 14 Aug 2016)