Posted by: (), Mon Feb 2, 2026 21:17 (2117 UTC)-- AVO Meeting notes for February 2, 2026 Great Sitkin: Orange Shishaldin: Yellow Ahyi: Yellow SIC: Matt Haney CS: David Fee Duty Scientist: Chris Waythomas AVO/CNMI Duty Remote Sensor: Chris Waythomas AVO/CNMI Duty Seismologist: Matt Haney Primary alarms: Matty Haney Secondary alarms: Chris Waythomas AVO radio: Cheryl Cameron DUTY SCIENTIST REPORT– + GREAT SITKIN (Orange/Watch): • SAR and clear satellite views showed southwestern lobe widening, southward flow motion as the flow inflates, and growth of the southern scree slope. • The active areas (including the extensional zone north of the moving south flank) were snow free in clear imagery and elevated surface temperatures and steaming were observed. • Local earthquakes and possible rockfall signals were detected in satellite data. • The webcam has lost focus. + SHISHALDIN (Yellow/Advisory): • Volcanic activity, along with the return of the sun and clear weather, gave us our first satellite SO2 detections of the season. • Plume was visible on clear views all week and reported by passing pilots (with a negative VAA posted by AAWU). • Weakly elevated surface temperatures were observed when nighttime imagery was clear. The vent still remains partially snowy and no SWIR signals suggestive of hot temperatures were observed. • Frequent LPs and tremor were observed all week + CNMI/AHYI (Yellow/Advisory): • Nothing observed in cloudy satellite views • No convincing detections from Wake Island + OTHER Umnak Island ash resuspension • Ash resuspension starting Thursday afternoon through Saturday from the south flanks of Okmok and Vsevidof • AAWU called to discuss before issuing their products, in part because the plume was pulsatory off Vsevidof and looked a little eruption-y. They put out products under “Okmok” but wrote “multiple sources on Umnak Island” • Info Statement went out the same way, under Okmok but also calling out Vsevidof (rather than both volcanoes or no volcanoes, but consistent with the VAAC) • Looked quite dusty in a photo shared from Nikolski Atka • A large increase in tremor triggered the RSAM alarm on Thursday night before dropping steeply off again • Draft VAN//VONA to Yellow was discussed but not issued based on a lack of clear relationships between tremor and explosions. Thanks to Aaron Wech for drafting it though! • This was not associated with any infrasound or significant plumes • The warm lake and snowy surroundings looked unchanged in clear imagery afterward Pavlof • Weakly elevated temperatures seen in clear overnight weather. This has not been typical for quite a while (~1.5 years or so) so just making a note • No apparent changes to the surface snow-cover or steaming areas in high-resolution satellite views • LPs continued this week • Following a question, Matt Loewen noted that there was mainly CO2 and a little SO2 detected at Pavlof last summer during the gas flight. This suggests a deep magma recharge. This has not been seen at Pavlof before but there are not many measurements. + Operational Notes: • There was an issue with HANS on Friday with the Weekly Update not posting to the email list. Scott Crass manually posted them. HANS worked okay through the weekend. • There was a duty scientist/remote sensor meeting following today’s staff meeting to discuss AVO response to resuspended ash. NET OPS/FIELDWORK: Max Enders Color Code: • Great Sitkin – All stations working. • Shishaldin – All stations currently working. High-rate radio network between Cold Bay and north Unimak dropped out early 2/2 and was shifted to the backup link this morning; data are currently catching up (backfilling from WEBT especially). Some SSBA data gaps persist (worse later last week than during previous week). Network, Multi-Station and Array Outages: • Port Heiden (#aniakchak, #veniaminof (north side) - 2025-12-13 07:07:08 UTC Power outage is ONGOING. – FAA was unsuccessful in making it to Port Heiden last week. They will attempt again this week. It is uncertain whether or not the partial government shutdown will impact any potential visit this week. • Katmai/Peulik - many little power flickers over the past week, but nothing exceeding our backup. Single Station Issues: -Wrangell - Tolsona sites (WASW, WACK) continue to have minor data gaps at IRIS. AVO Winston copy complete. -Spurr - Similar to last week. Small data gaps are likely to due radio link degradation by ice and snow. Nothing is hard out at this point, and voltages look decent with some evidence of recent charging at e.g. SPCR. -Iliamna – ILLG is completely out, ILSW power getting low. ILCB is currently out again. -Hague – D. Fee noted in the SOH channel that HAG low frequency noise worse in the last month. -Shishaldin – SSBA/AV36 and ISNN/AV38 low power, GNSS powered off at both stations to conserve power for seismic data. -Westdahl – WECS seismic offline to conserve power for GNSS and radios. WEBT is back online, but gappy. -Akutan - AKHS remains out. LVA and AKMO back online. AKS showing thin data gaps due to low power.-Makushin - MAPS is out due to LVD. DUTC-GPS out due to receiver problem. -Okmok – OKAK and OKWE no telemetry. Some data gaps on data streams repeating through MREP, likely related to snow/ice on hut. -Bogoslof – BOGO completely out last week. -Atka – KOSE/KONE short data gaps last week, presumably rime ice at repeater. -Adak Area – ADKI Infrasound element 6 is not working and element 2 reported as having reversed polarity. To the west, data gaps continue on sites that repeat through TASE gateway. This could be due to rime icing, or an antenna alignment issue. -GNSS sites - tracking antenna failures at OKCF, EDCR and now EDEC also. Tech Team Fieldwork: If the FAA is unable to make it out to Port Heiden eth AVO team will think about getting a crew out. OPEN ANNOUNCEMENTS + ADGGS – Scott Crass • Lee Zirnheld is out of the office until Feb.10. • Ian Adams is staffing the ADDGS booth at the Alaska Forum. • Dain Harmon has set up the HVO "Is Ash Falling?" application. • Dain continues work on the multimedia database ingesting old images using the suggested key words. • Scott Crass is working on the Remote Sensing database • Scott is also working on crafting custom queries for GeoDiva for the TIP group. • Cheryl Cameron will be covering some duties due to personnel gaps as work continues to open up a new position for a new position for a geologist hire. • Dr. Janine Andrys starts April 22. + UAF – David Fee • Most folks are around this week. • Thank you to everyone for a great Coordination Meeting, + AVO South – Matt Haney • Jake Lowenstern will be visiting AVO Anchorage February 18 – 20. • Matt Loewen announced that this month’s geology meeting will be next Thursday instead of this Thursday. See Mattermost for discussion. + USGS – Matt Haney • Jackie Verna and Scot Pekalib will be at AVO Anchorage February 17 – 20. • This is a Quicktime week. • Credit Card Statements are due by the 5th. • The Monitoring and Evaluation (M&E) group along with Wendy Stovall will be in Anchorage February 10, 11 and 12. • An email from Tim Steed came out on Friday regarding performance awards. The decision deadline for action or inaction is by close of business today. • Matt Haney is asking for volunteers to serve on a planning committee for an AVO open house to be held sometime in April or May. If you are interested, shoot Matt an email. • The AVO FEMA representative has been furloughed due to the partial government shutdown but can respond in an emergency. • Kristi Wallace, Dave Schneider and Matt Haney will be hosting a group from the FAA from 11:00am to 12:30pm on Friday • The Globe room will be used by visitors (Jackie Verna and the E&M group) while they are in town. • Matt Loewen announced that there will be a SEM tech visiting lab Wednesday through Friday this week. • Charles Olin issued a reminder that the Intune/Entra transition for laptops deadline is March 1. It takes about 2 hours and you’ll need to be in the building to log in. • John Lyons will be out on annual leave February 4 -14 and then will be heading to the Philippines February 17 – March 3 to assist with the eruption response of Mayon Volcano as part of the VDAP team. Attachments: This message is posted in the AVO Logs at https://www.avo.alaska.edu/admin/logs/posts/show/454795 _______________________________________________ Avo_ops mailing list -- avo_ops@list.avo.alaska.edu To unsubscribe send an email to avo_ops-leave@list.avo.alaska.edu