Wed, 28 Feb 2018, 06:00 INSIVUMEH reported that explosions at Santa María's Santiaguito lava-dome complex, detected by the seismic network during 27-28 February and 3-5 March, generated ash plumes that rose as high as 700 m and drifted S and SW. Avalanches of material descended the SE flank of the lava dome. Ash fell locally on the flanks and in San José. Read all

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Wed, 28 Feb 2018, 06:00On 2 March SNET reported that gas plumes rose as high as 400 m above San Miguel's crater rim during the previous week. Ash was in the emissions on 24, 26, and 28 February, and 1 March. RSAM values fluctuated between 70 and 179 units (normal values are 50-150 units) during 1-2 March. Read all

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Wed, 28 Feb 2018, 06:00 Observatorio Vulcanológico del Sur del IGP (OVS-IGP) and Observatorio Vulcanológico del INGEMMET (OVI) reported that explosive activity at Sabancaya decreased compared to the previous week; there was an average of 12 explosions recorded per day during 26 February-4 March. Seismicity was dominated by long-period events, with signals indicating emissions. Gas-and-ash plumes rose 2 km above the crater rim and drifted 30 km NW, W, and SW. Read all

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Wed, 28 Feb 2018, 06:00INSIVUMEH reported that during 27-28 February and 3-5 March Strombolian explosions at Pacaya's Mackenney Crater ejected material as high as 20 m above the main cone. Lava flows [advanced to 250 m elevation]. Read all

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Wed, 28 Feb 2018, 06:00 PHIVOLCS reported that during 27 February-5 March activity at Mayon was characterized by lava effusion from the summit crater, lava fountains, steam and ash emissions, advancing lava flows on the flanks, and pyroclastic flows. Weak and intermittent lava fountains generated steam and ash plumes that rose as high as 800 m and drifted in multiple directions; rumbling sounds were audible at least within a 10-km radius. Active lava flows extended 3.3 km, 4.5 km, and 1.9 km in the Mi-isi (S), Bonga (SE), and Basud (E) drainages, respectively. Read all

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Wed, 28 Feb 2018, 06:00During 28 February-6 March HVO reported that the lava lake continued to rise, fall, and spatter in Kilauea's Overlook crater. Webcams recorded incandescence from a small lava pond in a pit on the W side of Pu'u 'O'o Crater. Surface lava flows were active above and on the pali. Read all

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Wed, 28 Feb 2018, 06:00 INSIVUMEH reported that explosions at Fuego during 27-28 February and 3-5 March generated ash plumes that rose as high as 1.1 km and drifted 10-20 km W, SW, and S. Sometimes the explosions were accompanied by weak shock waves. Incandescent material was ejected as high as 300 m above the crater rim, and generated avalanches of material in the Seca (Santa Teresa, W), Cenizas (SSW), Las Lajas (SE), and Honda (E) ravines. Read all

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Wed, 28 Feb 2018, 06:00Based on observations by volcanologists in Severo-Kurilsk (Paramushir Island), about 7 km E of Ebeko, explosions during 23-25 and 27-28 February generated ash plumes that rose as high as 3.3 km (10,800 ft) a.s.l. The Aviation Color Code remained at Orange (the second highest level on a four-color scale). Read all

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Wed, 28 Feb 2018, 06:00 Based on analyses of satellite imagery, wind model data, and notices from PVMBG, the Darwin VAAC reported that during 28 February, and 1-2 and 4 March, ash plumes from Dukono rose to an altitude of 2.1 km (7,000 ft) a.s.l. and drifted in multiple directions. Read all

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Wed, 28 Feb 2018, 06:00AVO reported that elevated surface temperatures were identified in satellite images of Cleveland during 28 February-3 March. Local seismic and infrasound sensors recorded a small explosion at 0557 on 2 March prompting AVO to raise the Aviation Color Code to Orange and the Volcano Alert Level to Watch. A volcanic cloud rose to an altitude of 4.6 km (15,000 ft) a.s.l. and drifted ENE. Read all

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