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Small explosion at Santiaguito on the morning of 28 Dec 2015
During our stay at / near Santa Maria volcano during 26-29 Dec, we observed only explosive activity at Santiaguito, but no signs of effusive activity (lava flows): no rockfalls or other movements were seen at the recently active lava flows or on the flanks of the dome itself, indicating that at present, no lava flows are active.
Wed, 30 Dec 2015, 06:00PVMBG reported that during 21-28 December inclement weather sometimes prevented visual observations of Sinabung and the growing lava dome in the summit crater. As many as 21 hot avalanches and pyroclastic flows traveled .7-1.5 km ESE, producing ash plumes that rose 1 km. Ash plumes from explosions rose as high as 3 km and drifted E and SW.
Wed, 30 Dec 2015, 06:00
KVERT reported that during 25 December-1 January lava-dome extrusion onto Sheveluch's N flank was accompanied by fumarolic activity, dome incandescence, ash explosions, and hot avalanches. A collapse from the W flank of the lava dome produced a hot avalanche, and an ash plume that rose 5.5 km (18,000 ft) a.s.l. and drifted 50 km SE.
Wed, 30 Dec 2015, 06:00CENAPRED reported that during 29 December-5 January the seismic network at Popocatépetl recorded 4-92 daily emissions; 191 were detected on 3 January. As many as 11 explosions were detected daily and variable nighttime crater incandescence was observed. Explosions on 2 January ejected tephra onto the N flank, and a small steam, gas, and ash plume drifted E on 4 January.
Wed, 30 Dec 2015, 06:00
INETER reported that during 29-30 December no explosions at Momotombo were detected, though Real-time Seismic-Amplitude Measurements (RSAM) continued to be at moderate-to-high levels. Based on INETER and SINAPRED reports, three gas-and-ash explosions on 2 January, at 1333, 1426, and 1434, excavated the remaining parts of the lava dome which was emplaced about a month ago. An ash plume rose 500 m above the crater, drifted S and SW, and caused ashfall in Puerto Momotombo (9 km WSW).
Wed, 30 Dec 2015, 06:00HVO reported that seismicity beneath Kilauea's summit, upper East Rift Zone, and Southwest Rift Zone was at background levels during 30 December-5 January. The lava lake continued to circulate and spatter in the Overlook vent. On 2 January part of the E rim of the Overlook vent collapsed into the lava lake, triggering an explosion that ejected tephra onto the rim of the vent.
Wed, 30 Dec 2015, 06:00
KVERT reported that moderate explosive activity at Karymsky continued during 25 December-1 January. Satellite images detected an ash cloud, 56 km long and 6 km wide, drifting 145 km ENE on 25 December, and a thermal anomaly during 25, 27-28, and 31 December. The Aviation Color Code remained at Orange.
Wed, 30 Dec 2015, 06:00In a special report, INSIVUMEH reported a significant increase in activity at Fuego on 30 December. A series of pyroclastic flows descended the Las Lajas and El Jute drainages on the SE flank, and a dense ash plume rose 5 km and drifted 20 km W. Ashfall was reported in multiple communities on the flanks, including Panimache I and II (8 km SW), Morelia (9 km SW), and Santa Sofía (12 km SW).
Wed, 30 Dec 2015, 06:00
Based on analyses of satellite imagery and wind data, the Darwin VAAC reported that during 30 December-5 January ash plumes from Dukono rose to altitudes of 2.1-3.7 km (7,000-12,000 ft) a.s.l. and drifted 55-170 km in multiple directions.
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Wed, 30 Dec 2015, 06:00Based on satellite and webcam views, the Buenos Aires VAAC reported that on 30 December diffuse gas and steam plumes possibly containing ash drifted SSE. The next day ash emissions drifted SW.
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Wed, 30 Dec 2015, 06:00
Based on satellite images, wind data, webcam images, and notices from the Mexico City MWO, the Washington VAAC reported that during 30 December-3 January and 5 January ash plumes from Colima rose to altitudes of 4.6-6.7 km (15,000-22,000 ft) a.s.l. and drifted NW, N, NE, and E.
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Wed, 30 Dec 2015, 06:00SVERT reported that satellite images detected a thermal anomaly over Snow, a volcano of Chirpoi, during 28-29 December and 2 January. The Aviation Color Code remained at Yellow.
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Wed, 30 Dec 2015, 06:00
Based on analysis of satellite imagery and wind data, the Darwin VAAC reported that during 3-4 January an ash plume from Barren Island rose to an altitude of 1.5 km (5,000 ft) a.s.l. and drifted almost 85 km SW.
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Wed, 30 Dec 2015, 06:00Based on satellite and webcam images, the Darwin VAAC reported that during 30 December-5 January ash plumes from Tengger Caldera's Bromo cone rose to altitudes of 3.6-4.2 km (12,000-14,000 ft) a.s.l. and drifted 15-110 km in multiple directions.
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Wed, 30 Dec 2015, 06:00
PVMBG reported that during 28 December- 1 January white plumes rose 100 m above Soputan. Photos taken during 2-3 January showed that the plumes became denser and turned light gray, rising as high as 300 m. Thermal images revealed incandescence in Puncak Crater.
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Wed, 30 Dec 2015, 06:00Servicio Nacional de Geología and Minería (SERNAGEOMIN) Observatorio Volcanológico de Los Andes del Sur (OVDAS) reported that increasing seismicity at Nevados de Chillán and increased activity of the hydrothermal system prompted an Alert Level increase to Yellow, on a three-color scale. During 1-31 December the seismic network recorded 1,259 seismic events, including 186 volcano-tectonic events with a maximum local M (LM) of 1.8 located 17 km NNW at a depth of 4 km, 1,030 long-period earthquakes with a maximum LM 1.7, 40 short episodes of spasmodic tremor, and three tornillo-type events. The webcam recorded a small white plume rising from the crater on 9 December.
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Wed, 30 Dec 2015, 06:00
PHIVOLCS reported that at around 1230 on 30 Decemeber a low-energy explosion at Kanlaon, observed by residents in barangays Cabagnaan and Sag-ang in La Castellana (16 km SW), produced an ash plume that rose 100 m above the crater and slowly drifted SW. The Alert Level remained at 1 (on a scale of 0-5).
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Wed, 30 Dec 2015, 06:00INGV reported that after intense activity at Etna's Voragine Crater, Bocca Nuova, and the New Southeast Crater (NSEC) during the first 10 days of December, activity shifted to the Northeast Crater (NEC). During 9-10 December Strombolian activity was detected at NEC, with a few ejected incandescence bombs falling onto the outer flank and abundant ash emissions. Activity gradually diminished over a few days.
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Wed, 23 Dec 2015, 21:00
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View into Pacaya's Mackenney crater this morning (22 Dec 2015)
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(23 Dec) During our visit at the volcano this morning, the first direct observation of the crater was possible following a period of 5 days of bad weather. When we climbed the crater rim, we observed violent, continuous lava spattering from the central vent on an intra-crater cinder cone inside Mackenney crater.
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Wed, 23 Dec 2015, 06:00Based on information from PVMBG, satellite images, and ground reports, the Darwin VAAC reported that during 25 and 27-28 December ash plume from Sinabung rose to altitudes of 3.4-4 km (11,000-13,000 ft) a.s.l. Plumes drifted 10 km SW on 27 December.
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Wed, 23 Dec 2015, 06:00
KVERT reported that during 18-25 December lava-dome extrusion onto Sheveluch's N flank was accompanied by fumarolic activity, dome incandescence, ash explosions, and hot avalanches. Satellite images detected a daily and intense thermal anomaly over the dome, and ash plumes from hot avalanches rose up to 5 km (16,400 ft) a.s.l. that drifted SE on 21 December.
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Wed, 23 Dec 2015, 06:00Servicio Geológico Colombiano's (SGC) Observatorio Vulcanológico y Sismológico de Manizales reported that during 22-28 December seismicity at Nevado del Ruiz was characterized by long-period earthquakes and continuous volcanic tremor associated with gas-and-ash emissions. Earthquakes occurred at depths between 1 and 7.7 km. The largest event was recorded at 1457 on 28 December; it was a local M 1.4, 7 km N of Arenas Crater at a depth of 5.4 km.
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Wed, 23 Dec 2015, 06:00
HVO reported that seismicity beneath Kilauea's summit, upper East Rift Zone, and Southwest Rift Zone was at background levels during 23-29 December. The lava lake continued to circulate and spatter in the Overlook vent. Webcams recorded multiple incandescent outgassing vents within Pu'u 'O'o Crater and high on the northeast rim.
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Wed, 23 Dec 2015, 06:00KVERT reported that moderate explosive activity at Karymsky continued during 18-25 December. Satellite images detected an ash cloud, 8 x 6 km in size, drifting W on 22 December, and a thermal anomaly during 23-24 December. The Aviation Color Code remained at Orange.
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Wed, 23 Dec 2015, 06:00
Based on analyses of satellite imagery and wind data, the Darwin VAAC reported that during 23-29 December ash plumes from Dukono rose to an altitude of 2.1 km (7,000 ft) a.s.l. and drifted as far as 115 km S and SW.
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Wed, 23 Dec 2015, 06:00Based on satellite and webcam views, the Buenos Aires VAAC reported that during 24-25, 27, and 29 December diffuse ash plumes from Copahue rose to altitudes of 3-3.6 km (10,000-12,000 ft) a.s.l. and drifted SE.
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Wed, 23 Dec 2015, 06:00
Based on satellite images, wind data, webcam images, Colima Towers, and notices from the Mexico City MWO, the Washington VAAC reported that during 23-29 December ash plumes from Colima rose to altitudes of 4.6-6.1 km (15,000-20,000 ft) a.s.l. and drifted as far as 150 km NE, ENE, and E.
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Wed, 23 Dec 2015, 06:00SVERT reported that satellite images detected a weak thermal anomaly over Snow, a volcano of Chirpoi, during 21-23 and 27 December. The Aviation Color Code remained at Yellow.
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