Volcanos

Roundup of Global Volcanic Activity

Kilauea (Hawai'i): Some big changes in eruption activity here on Kilauea over the past few days. In the past 24 hours alone, 65 earthquakes were strong enough to be located beneath Kilauea Volcano! Gas emissions continued to be elevated at the summit over the past week as well.

Perhaps the biggest change in eruption activity was that the summit tiltmeters recorded almost 4 microradians of (possibly DI) deflationary tilt. The lava-lake level dropped slightly but is still at a measured 51m (167ft) below the floor of Halema'uma'u crater.

On the east rift zone at Pu'u 'O'o cinder cone, the USGS recorded about -2.3 microradians of deflationary tilt over the past 2 days. Via webcams glow is persistent from the north, south, and northeast spatter cones on the Pu'u 'O'o crater floor. From our observations, it looks as though the lava that spilled over the edge of the cinder cone last week to the south is forming a channel and, possibly a lava tube in turn, pointing towards the ocean. We are excited about this new activity on the east rift zone, which may allow us to safely and legally access surface flows once again here on Kilauea!

Currently erupting volcanos:

Ambrym (Vanuatu): active lava lakes in several craters

Bagana (Bougainville Island, Papua New Guinea): ash explosions

Barren Island (Indian Ocean): intermittent activity, likely strombolian-type and/or lava flows

Batu Tara (Sunda Islands, Indonesia): strombolian explosions, ash plumes up to 500 m, extrusion of a small lava dome with rockfalls

Colima (Western Mexico): extrusion of lava flow from summit, intermittent explosions

Dukono (Halmahera): thermal anomaly, probably small explosive activity in summit crater

Erebus (Antarctica): active lava lake in summit crater

Erta Ale (Ethiopia): active lava lake in northern pit crater, active hornito with intermittent flow in southern crater

Fuego (Guatemala): frequent moderate to large strombolian explosions

Gamalama (Halmahera): ash eruptions since 17 Sep

Grozny (Iturup Island): fumarolic activity

Heard (Australia, Southern Indian Ocean): likely lava lake in summit crater

Ibu (Halmahera, Indonesia): growing lava dome, occasional ash emissions

Karkar (Northeast of New Guinea): possible ash eruption on 1 February

Karymsky (Kamchatka): occasional small explosions, thermal anomaly

Kavachi (Solomon Islands): no eruption since 2007

Kilauea (Hawai'i): lava lakes in Halemau'uma'u and Pu'u 'O'o, lava flows on coastal flat and weakly active ocean entries

Kizimen (Kamchatka): degassing

Lokon-Empung (North Sulawesi, Indonesia): small explosions, lava flow?

Manam (Papua New Guinea): degassing, occasional ash venting

Marapi (Western Sumatra, Indonesia): sporadic explosions

Nishino-shima (Volcano Islands): lava effusion enlarging the new island

Nyiragongo (DRCongo): active lava lake in summit crater

Ol Doinyo Lengai (Tanzania): effusion of natrocarbonatite lava inside the crater

Reventador (Ecuador): intermittent explosions, lava fountaining and lava flow emission on 23-24 April

Sakurajima (Kyushu, Japan): ash venting, intermittent explosions

Santa María / Santiaguito (Guatemala): Santiaguito volcano (Guatemala): lava flow on south flank of dome becomes more active

Semeru (East Java, Indonesia): growing lava dome, ash venting and small to moderate explosions

Shiveluch (Kamchatka): growing lava dome, incandescent avalanches, occasional explosions

Sinabung (Sumatra, Indonesia): effusion of viscous lava, steaming, ash emissions

Slamet (Central Java): strombolian explosions from central crater

Stromboli (Eolian Islands, Italy): continuing lava overflows

Suwanose-jima (Ryukyu Islands): strombolian activity in summit crater

Tinakula (Santa Cruz Islands, Solomon Islands): increased activity at the volcano

Tungurahua (Ecuador): strombolian activity, effusion of lava flow on upper NW flank

Yasur (Tanna Island, Vanuatu): ash emissions, weak strombolian explosions