| (1) VOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA) | |
| (2) Issued: | (20201015/2025Z) |
| (3) Volcano: | Westdahl (VNUM #311340) |
| (4) Current Color Code: | GREEN |
| (5) Previous Color Code: | UNASSIGNED |
| (6) Source: | Alaska Volcano Observatory |
| (7) Notice Number: | |
| (8) Volcano Location: | N 54 deg 31 min W 164 deg 38 min |
| (9) Area: | Aleutians |
| (10) Summit Elevation: | 5118 ft (1560 m) |
| (11) Volcanic Activity Summary: | The Alaska Volcano Observatory (AVO) has reestablished seismic monitoring instruments at Westdahl volcano and can now confidently monitor seismic unrest at the volcano. With renewed seismic monitoring, the volcano moves from UNASSIGNED to Volcano Alert Level NORMAL and Aviation Color Code GREEN. As at other Alaska volcanoes, AVO will continue to monitor seismic, satellite, infrasound, and lightning data, and reports from pilots and ground observers to detect signs of eruptive activity. |
| (12) Volcanic cloud height: | n/a |
| (13) Other volcanic cloud information: | n/a |
| (14) Remarks: | |
| (15) Contacts: | Michelle Coombs, Scientist-in-Charge, USGS mcoombs@usgs.gov (907) 786-7497 David Fee, Coordinating Scientist, UAFGI dfee1@alaska.edu (907) 322-4085 |
| (16) Next Notice: | |