Semisopochnoi volcano news & activity updates:
Semisopochnoi volcano Volcanic Ash Advisory: 201810260447Z
Friday Oct 26, 2018 05:45 AM |
Satellite image of Semisopochnoi volcano on 26 Oct 2018Volcanic Ash Advisory Center Anchorage (VAAC) issued the following report:
FVAK21 at 05:38 UTC, 26/10/18 from PAWU
VOLCANO: SEMISOPOCHNOI 311060
PSN: N5156 E17935
AREA: ALEUTIAN ISLANDS
SUMMIT ELEV: 4006 FT [1221 M]
ADVISORY NR: 2018/001
INFO SOURCE: HIMAWARI/SEISMOGRAPH/AVO
AVIATION COLOR CODE: ORANGE
ERUPTION DETAILS: 201810260447Z
OBS VA DTG: 26/0533Z
OBS VA CLD: SFC/FL120 N5145 E17831 - N5104 W17945 - N5016 E17904
- N5117 E17734 - N5145 E17831 MOV SE 30KT.
FCST VA CLD +6HR: 26/1133Z SFC/FL120 N5138 E17904 - N4948 W17646
- N4853 W17833 - N5116 E17753 - N5138 E17904 - N5138 E17904.
FCST VA CLD +12HR: 26/1733Z NO VA EXP.
FCST VA CLD +18HR: 26/2333Z NO VA EXP.
RMK: T+0 CONFIDENCE LOW. VA APPEARS TO HAVE MADE IT JUST ABOVE THE
OCEANIC STRATUS FIELD.
NXT ADVISORY: WILL BE ISSUED BY 20181026/1133Z
DH OCT 2018 AAWU
Semisopochnoi volcano (United States, Aleutian Islands) activity update: Eruption stopped, continuing seismicity
Friday, Oct 12, 2018
AVO has lowered the Aviation Color Code and Alert Level to YELLOW/ADVISORY due to satellite observations and a lack of tremor lately indicating that eruptive activity has stopped. Elevated seismicity continues. [more]
Semisopochnoi volcano (United States, Aleutian Islands) activity update: New eruption, minor ash emissions, new tephra cone
Wednesday, Oct 03, 2018
On September 16, AVO raised the volcano to Aviation Color Code YELLOW and Volcanic Alert Level ADVISORY due to increased seismicity. The following day, activity increased further, with bursts of tremor; AVO raised the Aviation Color Code to ORANGE and Volcanic Alert Level to WATCH. Subsequent satellite imagery showed ash deposits and a new tephra cone on the northern cone of Mount Cerberus, one of the cones of the volcanic system. No significant emissions have been detected. [more]
Tuesday, Jun 02, 2015
A decline in seismicity over the last few months and no sign of activity in daily satellite images prompts AVO to downgrade Semisopochnoi volcano from Aviation Color Code YELLOW and Volcanic Alert Level ADVISORY to UNASSIGNED. (USGS) [more]
Semisopochnoi volcano (Aleutian Islands) activity update: increased seismic activity, eruption warning
Thursday, Mar 26, 2015
The Alaska volcano observatory (AVO) detected significantly increased earthquake activity under the volcano and warns of a possible eruption: ... [more]
Wednesday, Jul 23, 2014
Earthquakes have decreased but are still above background levels. No eruptive activity has been recorded. Alert level remains yellow. [more]