Contact | RSS | EN | DE | EL | ES | FR | IT | RU

Semisopochnoi Volcano Volcanic Ash Advisory: A SEQUENCE OF EXPLOSIONS STARTING AROUND 20Z CREATED AN ASH CL OUD to 10000 ft (3000 m)

Sun, 19 Sep 2021, 23:30 | BY: VN
Explosive activity continues. Volcanic Ash Advisory Center (VAAC) Anchorage warned about a volcanic ash plume that rose up to estimated 10000 ft (3000 m) altitude or flight level 100 and is moving at 15 kts in S direction.
The full report is as follows:

FVAK21 at 23:16 UTC, 19/09/21 from PAWU
VAAAK1
VA ADVISORY

DTG: 20210919/2252Z

VAAC: ANCHORAGE

VOLCANO: SEMISOPOCHNOI 311060

PSN: N5156 E17935

AREA: ALEUTIAN ISLANDS

SUMMIT ELEV: 4006 FT [1221 M]

ADVISORY NR: 2021/123

INFO SOURCE: HIMAWARI/AVO

AVIATION COLOR CODE: ORANGE

ERUPTION DETAILS: A SEQUENCE OF EXPLOSIONS STARTING AROUND 20Z CREATED AN ASH CL
OUD
MOVING MOVING FROM THE VOLCANO.

OBS VA DTG: 19/2252Z

OBS VA CLD: SFC/FL100 N5207 E17954 - N5117 W17842 - N5109 E17940
- N5209 E17907 - N5207 E17954 MOV S 15KT.

FCST VA CLD +6HR: 20/0452Z SFC/FL100 N5153 E17923 - N5208 W17911
- N5030 W17742 - N5034 E17937 - N5153 E17923 - N5153 E17923.

FCST VA CLD +12HR: 20/1052Z NO VA EXP.

FCST VA CLD +18HR: 20/1652Z NO VA EXP.

RMK: VA VISIBLE ON HIMAWARI SATELLITE RGB ASH SO2 AND DUST PRODUCTS.

NXT ADVISORY: WILL BE ISSUED BY 20210920/0452Z

KH SEP 2021 AAWU

Previous news

Wed, 15 Sep 2021, 06:00

Semisopochnoi volcano (Aleutian Islands, USA) - Smithsonian / USGS Weekly Volcanic Activity Report for 15 September-21 September 2021 (New Activity / Unrest)

AVO reported that eruptive activity at Semisopochnoi's North Cerberus crater continued during 15-21 September. Weather clouds obscured views of the volcano on most days. Several small daily explosions were recorded by local seismic stations; ash plumes were not visible in satellite images suggesting that they remained below 3 km (10,000 ft) a.s.l. and did not rise above the cloud deck. ... Read all
Tue, 14 Sep 2021, 00:30

Semisopochnoi volcano (Aleutian Islands): occasional low-level eruptive activity continues

Explosion from Semisopochnoi volcano this morning (image: AVO)
The explosive eruption of the volcano continues from the Mount Cerberus crater characterized by low-level ash emissions. ... Read all
Show more
Stratovolcano 1221 m / 4,006 ft
United States, Aleutian Islands, 51.93°N / 179.58°E
Current status: normal or dormant (1 out of 5) Semisopochnoi volcano eruptions:
2021, 2020, 2019, 2018, 1987
Typical eruption style
unspecified