Bogoslof volcano, United States, Aleutian Islands: news & activity updates
Aktualisiert: 16. Mai 2022 12:35 GMT - Neu laden
Mi, 6. Dez 2017, 06:00
On 6 December AVO decreased the Aviation Color Code and Volcano Alert Level for Bogoslof to Unassigned, noting that no significant activity had been observed in seismic, infrasound, satellite, or lightning data during the past three months. The last detected explosive activity occurred on 30 August 2017. Read allMi, 27. Sep 2017, 06:00
On 27 September AVO reported that the last explosion at Bogoslof was detected on 30 August, and no new volcanic activity was observed in satellite, seismic, or infrasound data since then. The Aviation Color Code was lowered to Yellow and the Volcano Alert Level was lowered to Advisory. Read allMehr anzeigen
Mi, 20. Sep 2017, 06:00
AVO reported that during 20-26 September nothing significant was observed in partly to mostly cloudy satellite images of Bogoslof, and no activity was detected in seismic or infrasound data. Weakly elevated surface temperatures were identified in satellite images during 22-23 September, indicating ongoing unrest. The Aviation Color Code remained at Orange and the Volcano Alert Level remained at Watch. Read allMi, 13. Sep 2017, 06:00
AVO reported that during 13-19 September nothing significant was observed in partly to mostly cloudy satellite images of Bogoslof, and no activity was detected in seismic or infrasound data. Weakly elevated surface temperatures were identified in satellite images during 13-14 and 16-17 September, indicating ongoing unrest. On 17 September discolored ocean water was visible in satellite data, possibly representing outflow from the crater. Read allMi, 6. Sep 2017, 06:00
AVO reported that during 6-12 September nothing significant was observed in mostly cloudy satellite images of Bogoslof, and no activity was detected in seismic or infrasound data. The 8 September report noted that the crater lake had been bisected by a narrow isthmus of land. Elevated surface temperatures were identified in one satellite image during 10-11 September. Read allMi, 30. Aug 2017, 13:30
Mi, 30. Aug 2017, 06:00
AVO reported that an explosive event at Bogoslof began at 0405 on 30 August and continued intermittently until 0555; the event produced a low-level ash plume that rose to around 6.1 km (20,000 ft) a.s.l. and drifted SSE. Later that day seismic and infrasound data showed quiet conditions, and a low-level plume (likely steam) drifted almost 65 km SSE. Read allMo, 28. Aug 2017, 20:15
Mo, 28. Aug 2017, 00:15
So, 27. Aug 2017, 01:30
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Mi, 23. Aug 2017, 06:00
AVO reported that a satellite image of Bogoslof acquired at 0628 on 24 August showed elevated surface temperatures and a small plume that was most likely steam drifting 17 km S. During 24-25 August a robust steam plume drifting 70 km SE and elevated surface temperatures were identified in satellite data. A four-minute-long explosion that began at 1629 on 26 August generated an eruption cloud that rose 8.2 km (27,000 ft) a.s.l. and drifted SE. Read allMi, 16. Aug 2017, 06:00
AVO reported that photographs of Bogoslof taken during an overflight on 15 August showed that the vent area (which had dried out during the 7 August eruption) had refilled with water. Seismicity decreased on 16 August and remained low at least through 18 August. Weakly elevated surface temperatures consistent with a warm lake were identified in satellite data during 19-20 August. Read allMi, 9. Aug 2017, 06:00
AVO reported that on 9 August seismic and infrasound data suggested low-level eruptive activity at Bogoslof; weakly elevated surface temperatures and a minor steam emission were identified in satellite images. No significant activity was observed in cloudy satellite images, and no activity was detected in seismic, infrasound, or lightning data during 10-13 August. Two short pulses of tremor were detected (at 0853, lasting five minutes, and at 0913, lasting three minutes) in seismic data; seismicity returned to baseline levels afterwards. Read allDi, 8. Aug 2017, 18:44
The Alaska Volcano Observatory reports that "no further ash emissions have occurred since the 3-hour-long eruption on Monday,7 August that began around 10:00 AKST (18:00 UTC),and seismicity remains low. Read allDi, 8. Aug 2017, 15:35

Seismic signal of yesterday's eruption at Bogoslof (recorded on MSW station on Makushin volcano about 60 km to the E (AVO)
Mo, 7. Aug 2017, 19:30
Mi, 2. Aug 2017, 06:00
AVO reported that during 2-6 August no activity at Bogoslof was observed in mostly cloudy satellite images, and no activity was detected in seismic, infrasound, or lightning data. An explosive eruption began at 1000 on 7 August, following more than an hour of increased seismicity. A pilot reported that an ash cloud rose to an altitude of 9.8 km (32,000 ft) a.s.l., prompting AVO to raise the Aviation Color Code (ACC) to Red and the Volcano Alert Level (VAL) to Warning. Read allMi, 26. Jul 2017, 06:00
AVO reported that during 26 July-1 August no activity at Bogoslof was observed in partly cloudy to clear satellite images, and no activity was detected in seismic, infrasound, or lightning data. The Aviation Color Code remained at Orange and the Volcano Alert Level remained at Watch. Read allMi, 19. Jul 2017, 06:00
AVO reported that during 19-25 July no significant activity at Bogoslof was observed in cloudy or mostly cloudy satellite images, and no activity was detected in seismic, infrasound, or lightning data. The Aviation Color Code remained at Orange and the Volcano Alert Level remained at Watch. Read allMi, 12. Jul 2017, 06:00
AVO reported that during 12-18 July no significant activity at Bogoslof was observed in cloudy or mostly cloudy satellite images; weakly elevated surface temperatures were noted on 12 and 16 July. In addition no activity was detected in seismic, infrasound, or lightning data. The Aviation Color Code remained at Orange and the Volcano Alert Level remained at Watch. Read allMehr anzeigen
Di, 11. Jul 2017, 02:15
Mo, 10. Jul 2017, 15:05

Seismic signal of this morning's eruptions at Bogoslof (recorded on MSW station on Makushin volcano about 60 km to the E (AVO)
Mo, 10. Jul 2017, 09:00
Sa, 8. Jul 2017, 19:15
Sa, 8. Jul 2017, 12:05
Two short explosive eruptions took place on 8 July morning at 10:15 and 10:29 local time (18:15 and 18:29 UTC). An ash plume rising up to 30,000 ft was estimated that drifted north. The Aviation Color Code was again increased to Red and the Alert Level to Warning. Read allMi, 5. Jul 2017, 11:37
Two significant explosive eruptions occurred at the volcano yesterday afternoon / evening: the first at 16:51 local time (00:51 July 5 UTC), followed by another one at 19:07 AKDT (03:07). Read allMi, 5. Jul 2017, 06:00
On 5 July AVO reported that no further activity was detected at Bogoslof after the explosions the day before; the Aviation Color Code (ACC) was lowered to Orange and the Volcano Alert Level (VAL) was lowered to Watch. A nine-minute-long eruption pulse was detected in seismic data starting at 1015 on 8 July was followed by a shorter pulse that began at 1029 and then a decline in seismicity. An ash plume identified in satellite images rose 9.1 km (30,000 ft) a.s.l. and drifted N. Read allMi, 5. Jul 2017, 01:45
Mo, 3. Jul 2017, 08:33
Another short-lived, but large explosive eruption occurred yesterday night (20:48 UTC or 12:48 AKDT local time on 2 July). The ash plume rose to approx. 36,000 ft (12 km) altitude and drifted east. Read allSo, 2. Jul 2017, 21:45