| (1) VOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA) | |
| (2) Issued: | (20190906/1828Z) |
| (3) Volcano: | Wrangell (VNUM #315020) |
| (4) Current Color Code: | GREEN |
| (5) Previous Color Code: | UNASSIGNED |
| (6) Source: | Alaska Volcano Observatory |
| (7) Notice Number: | |
| (8) Volcano Location: | N 62 deg W 144 deg 1 min |
| (9) Area: | Wrangell Volcanic Field |
| (10) Summit Elevation: | 14163 ft (4317 m) |
| (11) Volcanic Activity Summary: | The Alaska Volcano Observatory (AVO) has reestablished seismic monitoring instruments at Mount Wrangell 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 use satellite, infrasound, and lightning data, and reports from pilots and ground observers to detect signs of eruptive activity. |
| (12) Volcanic cloud height: | Not applicable |
| (13) Other volcanic cloud information: | Not applicable |
| (14) Remarks: | Mt. Wrangell is a 4317 m (14,163 ft) high, andesitic, shield volcano with an ice-filled summit caldera, located in the Wrangell-St. Elias National Park and Preserve. Mt. Wrangell has three small post-caldera craters, named North Crater, East Crater, and Mt. Zanetti. These craters are all geothermally active, and there are frequent historical reports of steam from Mt. Wrangell. There are also several questionable reports of historical eruptive activity. Mt. Wrangell is 330 km (206 mi) northeast of Anchorage. |
| (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: | A new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at http://www.avo.alaska.edu |