Lava continues to flow on K?lauea's coast, while its summit and rift zone continue to glow. Generally higher pressure over the past week, with fluctuations, has pushed new lava flows closer to the ocean than any time previously this year, but most are spreading out parallel to the coastline rather than directly to the ocean. Meanwhile, over the past week a new eastern flow branch developed above...

A new NASA satellite image reveals a fresh lava flow on Bagana volcano's eastern flank. It is unknown when the eruption started, but comparison with older images implies that it must have begun some time between March 2011 and February 2012. Bagana is of the most active volcanoes in Papua New Guinea, but extremely remote and there is no ground-based monitoring, which is why satellites provide...

The new Smithsonian / USGS Weekly Volcanic Activity Report was published today and is summarized as follows: -- new activity --- Ijen (East Java, Indonesia): decreasing activity, alert lowered to 2 (out of 4) Karangetang (Sangihe Islands, Indonesia): occasional ash eruptions reaching 3-4 km altitude Karthala (Comores Islands): incandescence at summit crater Popocatépetl (Mexico):...

The Sirung stratovolcano on the remote Pantar island in Indonesia has come back to life with a series of probably phreatic explosions and strong degassing. On 8 May a 3-hour long eruption took place at Sirung volcano. The eruption was accompanied by loud sounds and incandescent tephra observed rising 10 m above the crater. The explosion created an ash plume that reached 3.5 km altitude and...

A small seismic swarm occurred on 14-15 May near the Askja caldera in central Iceland, just southwest of Herðubreið volcano. Herðubreið volcano, located in the Highlands of Iceland in the midst of the Ódáðahraun desert, is an isolated, table-mountain shaped broad cone that formed beneath the icesheet that covered Iceland during the last ice age, which is when the volcano had its last eruption....

Katla volcano continues to show signs of increased unrest. A small glacial flood occurred from under the volcano's icecap Katla around 28 April 2012 and possibly again around 7-8 May, both times accompanied by increased levels of harmonic tremor. This suggests that magma movements inside the volcano might be heating up the ground, causing increased melting. A small seismic swarm at depths of...

A slight increase of seismic activity has been noted recently. On 12 May, 5 small quakes occurred in the western part of the island at depths of 2-17 km. It is unlikely that this is a precursor of a new eruptive phase, but rather reflects residual magma movements and minor tectonic adjustments at the recently emplaces dikes beneath the island.

The new Smithsonian / USGS Weekly Volcanic Activity Report was published today and is summarized as follows: -- new activity --- Batu Tara (Sunda Islands, Indonesia):occasional ash eruptions reaching 2.4 km altitude Cleveland (Aleutians): small explosions detected on 4-5 May, old lava dome destroyed, new (5th) lava dome growing Pago (Aleutians): strong ash eruptions, plumes reaching 13.7 km...

K?lauea's lava flows have surged in activity on the coastal plain accompanying inflation at the summit, though following by about 24 hours. This activity is farther from the ocean than before, relatively close to the base of the pali but moving quickly across cooling flows from the previous two months. Check out our new time-lapse movie showing the height of activity!

Since entering the National Park, lava flows have continued to slowly advance towards the ocean but have not made much ground. Pressure variations propagating through K?lauea volcano have kept the flows from building momentum, but they have persisted sluggishly and lava flows are still visible by means of a 6-7mi / 9-11km round-trip hike from the Kalapana side. When the lava is flowing more...

Since about 2 hours ago, tremor from Etna has started to rise steeply, suggesting that the next (26th) paroxysm of the New SE crater is probably imminent. At the moment, visible observations are difficult due to cloud cover, but it could be expected that there is some strombolian activity right now from the crater. Follow the eruption live: http://webcams.volcanodiscovery.com/

Nicaragua's Masaya volcano, located about 20 km south of Managua city, has entered a new eruptive phase. The latest report of the Instituto Nicaragüense de Estudios Territoriales (INETER) mentions 24 small ash and steam explosions that were recorded between 30 April and 1 May. 9 of these explosions produced ash clouds that rose about 500 m above the Santiago crater rim. The activity followed an...

A new eruption on the remote Zavodovski Island in the South Sandwich island chain was detected by NASA's Aqua satellite on 27 April 2012. The satellite picture shows a plume originating from the island's active crater known as Mt Curry, or sometimes also referred to as Mt Asphyxia. It is possible that the plume is created by lava flows in contact with sea water, as it appears to be mainly steam....

The new Smithsonian / USGS Weekly Volcanic Activity Report was published today and is summarized as follows: -- new activity --- Batu Tara (Sunda Islands, Indonesia): occasional ash eruptions, plumes up to 2.4 km altitude Cleveland (Aleutians, Alaska): new small lava dome 25 m across detected Iwo-jima (Ioto) (Volcano Islands, Japan): small eruption on 2 May, lake water...

Popocatépetl volcano continues to produce ash and steam eruptions several times a day, that generate plumes rising up to 1-2 km above the crater. A more powerful emission is in progress at the time of writing (see image).

A recently published study shows that Mt Merapi volcano near Yogyakarta has been inflating during the past 2 years, following its last and deadly eruption in 2010. According to the study, Merapi has entered a new cycle of inflation which is a typical precursor of a new lava dome-building eruption caused by rising magma within the conduit of the volcano. At the moment, there is no way to predict...