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Semisopochnoi Volcano Volcanic Ash Advisory: OCNL ERUPTIONS. to 8000 ft (2400 m)

ven., 19 nov. 2021, 10:45
10:45 AM | AUTEUR : VN
Explosive activity continues. Volcanic Ash Advisory Center (VAAC) Anchorage warned about a volcanic ash plume that rose up to estimated 8000 ft (2400 m) altitude or flight level 080 and is moving at 15 kts in WNW direction.
The full report is as follows:

FVAK21 at 10:33 UTC, 19/11/21 from PAWU
VAAAK1
VA ADVISORY

DTG: 20211119/1030Z

VAAC: ANCHORAGE

VOLCANO: SEMISOPOCHNOI 311060

PSN: N5156 E17935

AREA: ALEUTIAN ISLANDS

SUMMIT ELEV: 4006 FT [1221 M]

ADVISORY NR: 2021/194

INFO SOURCE: HIMAWARI/GOES 17/WEBICORDER

AVIATION COLOR CODE: ORANGE

ERUPTION DETAILS: OCNL ERUPTIONS.

OBS VA DTG: 19/1030Z

OBS VA CLD: SFC/FL080 N5248 E17810 - N5205 E17955 - N5146 E17933
- N5223 E17744 - N5248 E17810 MOV WNW 15KT

FCST VA CLD +6HR: 19/1630Z SFC/FL080 N5225 E17730 - N5204 E17948
- N5124 E17936 - N5133 E17734 - N5225 E17730

FCST VA CLD +12HR: 19/2230Z SFC/FL080 N5206 E17945 - N5038
W17931 - N5006 E17831 - N5115 E17630 - N5134 E17744 - N5206 E17945

FCST VA CLD +18HR: 20/0430Z SFC/FL080 N5203 E17947 - N4936
W17741 - N4843 W17941 - N4948 E17728 - N5022 E17817 - N5003
W17928 - N5149 E17917 - N5203 E17947 - N5203 E17947

RMK: METEOROLOGICAL CLDS HAVE MOVED FAR ENOUGH AWAY FROM THE VOLCANO SUMMIT
THAT A VA SIGNAL IS OBSERVED. THIS SIGNAL EMERGED ALG WITH AN UPTICK IN SEISMIC
WEBICORDER DATA. TRANSPORT WINDS INITIALLY OUT OF THE SE BECMG MORE OUT OF THE
N IN COMING HRS AS A LOW PRES SYSTEM TRACKS INTO THE CENTRAL ALUTNS FM THE PAC
SIDE. ...JAM

NXT ADVISORY: WILL BE ISSUED BY 20211119/1630Z

Actualités précédentes

mer., 17 nov. 2021, 06:00
AVO reported that eruptive activity at Semisopochnoi's North Cerberus crater continued during 17-23 November. Daily minor explosions were detected in seismic and infrasound data. Small ash plumes rising no higher than 3 km (10,000 ft) a.s.l. likely continued to be emitted, though weather clouds obscured satellite and webcam views of the volcano on most days. ... Read all
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