Worldwide Volcano News and Updates

KVERT reported that during 22-29 January 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. The Aviation Color Code remained at Orange. Read all

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INSIVUMEH reported that during 29 January-1 February explosions from Caliente cone, part of Santa María's Santiaguito lava-dome complex, generated ash plumes that rose 600-800 m and drifted E, SE, and SW. Ashfall was reported in Monte Claro (S), San Marcos (10 km SW), Palajunoj (18 km SSW), Aldea, and Santa María de Jesús. Small avalanches were generated from active lava flows. Read all

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Satellite data and ground-based observations from a field crew and local residents near Pagan indicated that steam-and-gas emissions have significantly decreased since March 2015. The Aviation Color Code and Volcano Alert Level were lowered to Unassigned on 30 January. Read all

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Servicio Geológico Colombiano's (SGC) Observatorio Vulcanológico y Sismológico de Manizales reported that during 26 January-1 February 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 8.7 km. The largest event was recorded at 1300 on 28 January; it was a local M .9, N of Arenas Crater at a depth of 3.2 km. Read all

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INETER reported that during 26-29 January RSAM values at Momotombo were at low to moderate levels, and gas emissions were at moderate levels. Crater incandescence from high-temperature gas emissions was observed at night during 26-27 January. A Strombolian explosion at 0344 on 30 January ejected tephra onto the E, NE, N, and NW flanks, and produced gas emissions. Read all

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HVO reported that seismicity beneath Kilauea's summit, upper East Rift Zone, and Southwest Rift Zone was at background levels during 27 January-2 February. 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. Read all

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KVERT reported that moderate explosive activity at Karymsky continued during 22-29 January. Satellite images detected a thermal anomaly on 23 and 26 January, and ash plumes that drifted about 160 km E and NW on 24 and 26 January, respectively. The Aviation Color Code remained at Orange. Read all

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Based on analyses of satellite imagery and wind data, the Darwin VAAC reported that during 27 January-2 February ash plumes from Dukono rose to altitudes of 2.4-3 km (7,000-10,000 ft) a.s.l. and drifted 35-205 km in multiple directions. Read all

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On 29 January IG reported that in recent weeks surficial activity at Cotopaxi was characterized by minor steam emissions from the crater and sporadic gas emissions with minor amounts of ash. Sulfur dioxide emissions were less than 1,000 tons per day (pre-eruptive levels) and seismicity had almost returned to baseline levels. At 1843 on 24 January a plume with low-to-moderate levels of ash rose 700 m above the crater and drifted W. Read all

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Based on satellite and webcam views, the Buenos Aires VAAC reported that during 28 January-2 February Copahue generated almost continuous steam plumes containing minor amounts of ash that rose to altitudes of 3-3.6 km (10,000-12,000 ft) a.s.l. and drifted as far as 160 km SE and SW. Read all

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