Volcano activity world-wide summary 29 Aug - 4 Sept
jeu., 6 sept. 2012, 06:47 06:47 AM | AUTEUR : TThe new Smithsonian / USGS Weekly Volcanic Activity Report was published today and is summarized as follows:
-- new activity ---
Bezymianny (Kamchatka): explosive eruption on 2 Sep
Grozny (Kuriles): During 23 August-3 September fumarolic activity at Grozny Group increased.
Krakatau (Sunda Strait, Indonesia): During 1 June-1 September had only white plumes rising from the crater. Seismicity increased significantly in August. On 2 September seismicity again increased, and at 1830 a Strombolian eruption ejected lava 200-300 m above the crater. Based on analyses of satellite imagery, on 3 September ash plumes rose to altitudes of 2.4-4.3 km (8,000-14,000 ft) a.s.l. and drifted 35-95 km N.
Little Sitkin (Aleutians, Alaska): High-frequency seismic swarm on 29-31 August, elevated seismicity through 3 September.
Soufrière Hills (Montserrat): low activity, small pyroclastic flow on 29 Aug
Tiatia (Kuriles): thermal anomaly at summit detected on 1 Sep
Tungurahua (Ecuador): felt earthquakes, steaming, weak explosions, crater glow
--- ongoing activity ---
Batu Tara (Sunda Islands, Indonesia): frequent ash eruptions reaching 2-3 km altitude
Cleveland (Aleutians): ash at summit, no lava dome visible in the funnel-shaped crater on 17 Aug
Fuego (Guatemala): paroxysm during 3-4 Sep with lava and pyroclastic flows
Karmysky (Kamchatka): moderate seismic activity, thermal anomaly, occasional ash explosions up to 4.5 km altitude
Kilauea (Hawaii): intermittent lava flows on pali and coastal plain, lava lakes in Halema'uma'u Crater and Pu'u 'O', partial crater floor collapse in Pu'u 'O'o on 30 Aug
Nevado del Ruiz (Colombia): gas and steam emissions
Popocatépetl (Mexico): strong gas and steam emissions, alert lowered on 1 Sep
Sakurajima (Japan): occasional explosions up to 3.7 km altitude, bombs ejected to up to 1300 m distance
Santiaguito (Guatemala): ash explosions 300-800 m high, 4 active flows, occasional lahars
Shiveluch (Kamchatka): viscous lava flow on NE flank, hot avalanches, growing lava dome
mer., 5 sept. 2012, 13:04
lun., 3 sept. 2012, 16:30