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[AVO-OPS] AVO LOG- Seismic Summary - 12/28/2025
by logs--- via Avo_ops 30 Dec '25

30 Dec '25

Posted by: cheryl searcy (csearcy(a)usgs.gov), Tue Dec 30, 2025 20:50 (2050 UTC)-- "Significant" located earthquakes for December 28, 2025: (picking by Cheryl Searcy) Iliamna: 7; Spurr: 4; Katmai: 3; Fourpeaked: 2; Mageik: 1; Makushin: 1; Martin: 1; Ugashik-Peulik: 1 ======================== Iliamna (7 EQs): 1 EQ ~9 km NE of the summit ML 0.2; Z = 14.1 km 1 EQ ~11 km NE of the summit ML 0.1; Z = 3.7 km 1 low frequency EQ ~8 km ENE of the summit ML 0.0; Z = 0.7 km 1 moderately deep low frequency EQ ~5 km S of the summit ML -0.3; Z = 19.8 km 1 low frequency EQ ~2 km E of the summit ML -0.4; Z = -2.5 km 1 low frequency EQ ~4 km N of the summit ML -0.4; Z = 2.0 km 1 low frequency EQ ~3 km SSE of the summit ML -0.8; Z = 0.7 km Spurr (4 EQs): 1 EQ ~24 km S of the summit ML 1.1; Z = 3.3 km 1 EQ ~8 km S of the summit ML 0.0; Z = 5.2 km 1 EQ ~16 km S of the summit ML -0.4; Z = 5.3 km 1 EQ ~14 km S of the summit ML -1.0; Z = 5.6 km Katmai (3 EQs): 1 EQ ~2 km W of the summit ML 0.2; Z = 2.8 km 1 EQ ~11 km NNE of the summit ML 0.2; Z = 4.9 km 1 EQ ~3 km W of the summit ML -0.3; Z = 3.0 km Fourpeaked (2 EQs): 1 EQ ~8 km SW of the summit ML 0.8; Z = 4.6 km 1 EQ ~26 km WNW of the summit ML 0.6; Z = 3.3 km Mageik: 1 EQ ~8 km SE of the summit ML -0.4; Z = 4.0 km Makushin: 1 EQ ~20 km E of the summit ML 0.8; Z = 7.6 km Martin: 1 EQ ~15 km NW of the summit ML 0.3; Z = 3.9 km Ugashik-Peulik: 1 EQ ~24 km S of the summit ML 1.7; Z = 7.6 km Attachments: This message is posted in the AVO Logs at https://www.avo.alaska.edu/admin/logs/posts/show/454536 _______________________________________________ Avo_ops mailing list -- avo_ops(a)list.avo.alaska.edu To unsubscribe send an email to avo_ops-leave(a)list.avo.alaska.edu

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[AVO-OPS] AVO RSDB- 30 Dec 2025 satellite report
by Jordan Lubbers via Avo_ops 30 Dec '25

30 Dec '25

Associated Images: https://www.avo.alaska.edu/admin/rsdb/files/show/62939 : gsitkin_gsck-20251230T020600Z.jpg https://www.avo.alaska.edu/admin/rsdb/files/show/62940 : 375mAKKN-MIR-d20251230t1414340677Z.png Associated Keywords: Elevated surface temperatures: barely elevated; Cloud cover: partly cloudy; Associated Images: https://www.avo.alaska.edu/admin/rsdb/files/show/62941 : shishaldin_brpk-20251230T013100Z.jpg https://www.avo.alaska.edu/admin/rsdb/files/show/62942 : shishaldin_20251218T2140_wv3_swir.jpg https://www.avo.alaska.edu/admin/rsdb/files/show/62943 : shishaldin_20251218T2140_wv3_vis.jpg Associated Keywords: Volcanic clouds: steam/water; Elevated surface temperatures: barely elevated; Cloud cover: partly cloudy; Associated Images: https://www.avo.alaska.edu/admin/rsdb/files/show/62944 : 375mAKKO-MIR-d20251230t1414340677Z.png Associated Keywords: Elevated surface temperatures: moderately elevated; Cloud cover: mostly clear; Associated Images: https://www.avo.alaska.edu/admin/rsdb/files/show/62945 : 375mAKCL-MIR-d20251230t1323586989Z.png To view these and other satellite data, please use http://volcview.wr.usgs.gov/ Duty person can be reached at (907) 786-7481 if you have any questions. Last image viewed: 30 Dec 2025 18:31 UTC _______________________________________________ Avo_ops mailing list -- avo_ops(a)list.avo.alaska.edu To unsubscribe send an email to avo_ops-leave(a)list.avo.alaska.edu

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[AVO-OPS] AVO LOG- Seismic Summary - 12/29/2025
by logs--- via Avo_ops 30 Dec '25

30 Dec '25

Posted by: cheryl searcy (csearcy(a)usgs.gov), Tue Dec 30, 2025 18:43 (1843 UTC)-- "Significant" located earthquakes for December 29, 2025: Picking by Scott Stihler) Iliamna: 6; Katmai: 4; Makushin: 4; Martin: 2; Okmok: 2; Takawangha: 2; Gareloi: 1; Redoubt: 1; Spurr: 1 ======================== Iliamna (6 EQs): 1 EQ ~1 km E of the summit ML -0.3; Z = 0.7 km 1 EQ ~2 km N of the summit ML -0.5; Z = 0.4 km 1 EQ ~2 km S of the summit ML -0.6; Z = 2.0 km 1 EQ ~2 km SE of the summit ML -0.6; Z = 1.1 km 1 EQ ~2 km E of the summit ML -0.7; Z = 3.3 km 1 EQ ~3 km SSW of the summit ML -0.7; Z = -1.9 km Katmai (4 EQs): 1 EQ ~7 km ENE of the summit ML 1.0; Z = 5.2 km 1 EQ ~7 km ENE of the summit ML 0.7; Z = 4.9 km 1 EQ ~3 km NW of the summit ML -0.0; Z = 3.1 km 1 EQ ~3 km WNW of the summit ML -0.6; Z = 3.0 km Makushin (4 EQs): 1 EQ ~20 km E of the summit ML 0.5; Z = 8.2 km 1 EQ ~20 km S of the summit ML 0.4; Z = 10.5 km 1 EQ ~20 km E of the summit ML 0.4; Z = 8.2 km 1 EQ ~5 km NE of the summit ML 0.0; Z = 4.4 km Martin (2 EQs): 1 EQ ~0 km N of the summit ML -0.1; Z = 0.8 km 1 EQ ~0 km SSE of the summit ML -0.4; Z = 1.3 km Okmok (2 EQs): 1 EQ ~5 km SW of the center of caldera ML 1.0; Z = 0.2 km 1 EQ ~7 km SSW of the center of caldera ML 0.9; Z = 3.9 km Takawangha (2 EQs): 1 EQ ~19 km E of the summit ML 1.1; Z = 7.9 km 1 EQ ~5 km E of the summit ML 0.7; Z = 7.2 km Gareloi: 1 low frequency EQ ~1 km WNW of the summit ML 0.8; Z = 5.0 km Redoubt: 1 EQ ~5 km NE of the summit ML 0.1; Z = 7.0 km Spurr: 1 EQ ~11 km S of the summit ML -0.6; Z = 2.7 km Attachments: This message is posted in the AVO Logs at https://www.avo.alaska.edu/admin/logs/posts/show/454533 _______________________________________________ Avo_ops mailing list -- avo_ops(a)list.avo.alaska.edu To unsubscribe send an email to avo_ops-leave(a)list.avo.alaska.edu

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[AVO-OPS] AVO LOG- Seismic Summary - 12/26/2025
by logs--- via Avo_ops 30 Dec '25

30 Dec '25

Posted by: cheryl searcy (csearcy(a)usgs.gov), Tue Dec 30, 2025 00:05 (0005 UTC)-- "Significant" located earthquakes for December 26, 2025: (picking by Cheryl Searcy) Iliamna: 12; Katmai: 8; Makushin: 7; Novarupta: 3; Okmok: 3; Griggs: 1; Martin: 1; Spurr: 1; Trident: 1; Steller: 1 ======================== Iliamna (12 EQs): 1 EQ ~18 km NNW of the summit ML 0.4; Z = 6.2 km 1 low frequency EQ ~6 km NNW of the summit ML -0.0; Z = 8.6 km 1 low frequency EQ ~2 km SE of the summit ML -0.1; Z = 0.6 km 1 EQ ~0 km S of the summit ML -0.1; Z = -1.9 km 1 moderately deep low frequency EQ ~8 km WSW of the summit ML -0.2; Z = 12.5 km 1 EQ ~2 km NE of the summit ML -0.6; Z = 1.2 km 1 EQ ~2 km NNE of the summit ML -0.7; Z = -1.1 km 1 low frequency EQ ~2 km NNE of the summit ML -0.8; Z = 0.8 km 1 low frequency EQ ~4 km SSW of the summit ML -0.8; Z = 1.4 km 1 EQ ~7 km E of the summit ML -1.0; Z = 3.9 km 1 low frequency EQ ~3 km NNE of the summit ML -1.1; Z = 0.9 km 1 low frequency EQ ~2 km NNE of the summit ML -1.1; Z = -2.3 km Katmai (8 EQs): 1 EQ ~7 km ENE of the summit ML 1.4; Z = 5.5 km 1 EQ ~2 km NW of the summit ML 0.9; Z = 2.6 km 1 EQ ~2 km NW of the summit ML 0.6; Z = 3.5 km 1 EQ ~8 km ENE of the summit ML 0.3; Z = 4.4 km 1 EQ ~6 km NE of the summit ML 0.2; Z = 3.6 km 1 EQ ~8 km ENE of the summit ML 0.1; Z = 4.8 km 1 EQ ~2 km NW of the summit ML -0.2; Z = 1.9 km 1 EQ ~3 km NW of the summit ML -0.3; Z = 3.0 km Makushin (7 EQs): 1 EQ ~20 km E of the summit ML 1.4; Z = 8.6 km 1 EQ ~20 km E of the summit ML 0.8; Z = 7.3 km 1 EQ ~26 km ENE of the summit ML 0.7; Z = 9.8 km 1 EQ ~20 km E of the summit ML 0.5; Z = 8.5 km 1 EQ ~20 km E of the summit ML 0.2; Z = 7.6 km 1 EQ ~20 km E of the summit ML 0.2; Z = 7.3 km 1 EQ ~18 km E of the summit ML 0.1; Z = 7.3 km Novarupta (3 EQs): 1 EQ ~4 km ENE of the 1912 dome ML 0.3; Z = 4.0 km 1 EQ ~3 km SSW of the 1912 dome ML -0.2; Z = 3.3 km 1 EQ ~3 km NE of the 1912 dome ML -0.6; Z = 4.6 km Okmok (3 EQs): 1 EQ ~2 km SE of the center of caldera ML 0.5; Z = 3.0 km 1 EQ ~4 km SE of the center of caldera ML 0.4; Z = 2.9 km 1 EQ ~4 km WNW of the center of caldera ML 0.3; Z = 3.0 km Griggs: 1 moderately deep low frequency EQ ~5 km SSE of the summit ML 0.2; Z = 15.1 km Martin: 1 EQ ~1 km SW of the summit ML -0.5; Z = 1.7 km Spurr: 1 EQ ~17 km W of the summit ML 0.5; Z = 3.5 km Trident: 1 EQ ~0 km N of the summit ML -0.3; Z = 4.1 km Steller: 1 EQ ~9 km WSW of the summit ML 0.4; Z = 3.8 km Attachments: This message is posted in the AVO Logs at https://www.avo.alaska.edu/admin/logs/posts/show/454529 _______________________________________________ Avo_ops mailing list -- avo_ops(a)list.avo.alaska.edu To unsubscribe send an email to avo_ops-leave(a)list.avo.alaska.edu

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[AVO-OPS] AVO LOG- AVO Meeting notes for December 28, 2025
by logs--- via Avo_ops 29 Dec '25

29 Dec '25

Posted by: cheryl searcy (csearcy(a)usgs.gov), Mon Dec 29, 2025 20:24 (2024 UTC)-- AVO Meeting notes for December 28, 2025 Great Sitkin: Orange Shishaldin: Yellow Ahyi: Yellow SIC: Matt Haney CS: David Fee Duty Scientist: John Lyons Duty Remote Sensor: Tim Orrr (Jordan Lubbers until Jan. 30) Duty Seismologist: John Lyons CNMI duty seismologist: John Lyons CNMI Remote Sensor: Tim Orrr (Jordan Lubbers until Jan. 30) Primary alarms: John Lyons Secondary alarms: Matt Haney AVO radio: Cheryl Cameron DUTY SCIENTIST REPORT– Cheryl Searcy + GREAT SITKIN (Orange/Watch): No major changes. Satellite and webcam views were cloudy for much of the week. Weak seismicity occasionally observed. + SHISHALDIN (Yellow/Advisory): No major changes. Satellite and webcam views were cloudy for much of the week. Steaming from the summit was observed in webcam images when clear. LP activity continues all week with wind often obscuring infrasound signals. + ANIAKCHAK (Unassigned): Aniakchak was taken to Unassigned on Tuesday, December 23 due to lack of seismic data following a power disruption at the receive facility in Port Heiden. + CNMI/AHYI (Yellow/Advisory): Discolored water observed in satellite data on Monday, December 22. Nothing else observed in satellite or Wake Island data the rest of the week. + RESUSPENDED ASH: There were a number of SIGMETS issued regarding resuspended ash at several volcanoes. There was some discussion on how best to handle these. Dave Schneider and Kristi Wallace will contact Dave at the Anchorage VAAC to coordinate and then there will likely be a duty scientist meeting to finalize. + OPERATIONS: Virtual servers hosting applications for HANS/VNS, Volcview, Ashcam, Ash3d and other systems failed Christmas Eve (due to physical drive failures). Information products are not posting to VNS starting Wednesday. The issue is being addressed. NET OPS/FIELDWORK: Ellie Boyce Color Code: Great Sitkin – All stations working. Shishaldin – All stations working except some SSBA data gaps. Network, Multi-Station and Array Outages: --Port Heiden (#aniakchak, #veniaminof (north side) - 2025-12-13 07:07:08 UTC Power outage is ONGOING. --Sand Point (SDPI array) - outage continues, partner-procured internet outage --Adak - power outage started 2025-12-27 04:00 UTC, ongoing. A ticket will be filed with TDX. Single Station Issues -Wrangell – WAZA continues to be very gappy. Tolsona sites continue to have minor data gaps at IRIS. AVO Winston copy complete. -Iliamna – ILLG and ILCB remain out, ILSW power getting low. -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. -Akutan -LVA out due to low voltage. -Okmok – OKAK and OKWE no telemetry. -Bogoslof – BOGO completely out last week, it was on back on briefly on 11/12 and 11/13. -Atka – KOSE/KONE data gaps last week, presumably rime ice at repeater. -Adak – Infrasound element 6 is not working and element 2 reported as having reversed polarity. -Little Sitkin -Gappy data and outages from LSNW and LSSA probably due to icing on LSSA radio antennas. Other -Special mention of Katmai, which has 100% data completeness for the last week of December. OPEN ANNOUNCEMENTS + ADGGS – Scott Crass • It is -45 degrees F in Fairbanks. Many folks are working from home. Dain Harmon made it into the office. • Several folks will be out on Friday. Scott will be out Friday and Monday. + UAF – Jessica Larsen • Jess attended AGU. She noted that there were a fair number of withdrawn talks and posters. She was able to attend the SD4Z meetings and reports that those projects are proceeding nicely. + AVO South – Matt Haney • David Fee is working on the draft agenda for the CoMeet. He requests that folks send him ideas/suggestions. • Reminder that the non-network field proposals are due Jan. 9. • Hans Schwaiger reported that he will be out of the office Wednesday of this week through next Tuesday. Tim Orr is covering his duty Remote Sensing shifts next Monday and Tuesday. • Also from Hans, Ash3D traffic is being routed through Anchorage servers following the server crash in California. He will hopefully have the CA server version up sometime today. • Jordan Lubbers reported that there will be a VSC seminar on Jan. 20 with the contractors who are reviewing information products. + USGS – Matt Haney • EPAPs are due Jan. 9 Attachments: This message is posted in the AVO Logs at https://www.avo.alaska.edu/admin/logs/posts/show/454527 _______________________________________________ Avo_ops mailing list -- avo_ops(a)list.avo.alaska.edu To unsubscribe send an email to avo_ops-leave(a)list.avo.alaska.edu

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[AVO-OPS] AVO RSDB- 29 Dec 2025 satellite report
by Jordan Lubbers via Avo_ops 29 Dec '25

29 Dec '25

Associated Keywords: Cloud cover: partly cloudy; Associated Images: https://www.avo.alaska.edu/admin/rsdb/files/show/62938 : shishaldin_brpk-20251229T013100Z.jpg Associated Keywords: Volcanic clouds: steam/water; Cloud cover: partly cloudy; VIIRS data still out in AVO-VolcView. Report limited to TROPOMI, AVHRR, Sentinel-2, and WorldView imagery. To view these and other satellite data, please use http://volcview.wr.usgs.gov/ Duty person can be reached at (907) 786-7481 if you have any questions. Last image viewed: 29 Dec 2025 19:11 UTC _______________________________________________ Avo_ops mailing list -- avo_ops(a)list.avo.alaska.edu To unsubscribe send an email to avo_ops-leave(a)list.avo.alaska.edu

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[AVO-OPS] AVO LOG- Seismic Summary - 12/27/2025
by logs--- via Avo_ops 28 Dec '25

28 Dec '25

Posted by: cheryl searcy (csearcy(a)usgs.gov), Sun Dec 28, 2025 20:17 (2017 UTC)-- "Significant" located earthquakes for December 27, 2025: (picking by Scott Stihler) Katmai: 8; Spurr: 5; Iliamna: 4; Great Sitkin: 1; Makushin: 1; Snowy: 1; Fourpeaked: 1 ======================== Katmai (8 EQs): 1 EQ ~2 km NW of the summit ML 0.6; Z = 2.8 km 1 EQ ~1 km SE of the summit ML 0.5; Z = 4.6 km 1 EQ ~2 km NW of the summit ML 0.4; Z = 3.3 km 1 EQ ~6 km NNE of the summit ML 0.0; Z = 4.6 km 1 EQ ~6 km NNE of the summit ML -0.1; Z = 4.1 km 1 EQ ~5 km NW of the summit ML -0.1; Z = 2.1 km 1 EQ ~3 km NW of the summit ML -0.2; Z = 3.0 km 1 EQ ~4 km NNE of the summit ML -0.2; Z = 4.3 km Spurr (5 EQs): 1 EQ ~5 km W of the summit ML 0.1; Z = -3.1 km 1 deep low frequency EQ ~9 km SSE of the summit ML -0.5; Z = 32.5 km 1 EQ ~5 km W of the summit ML -0.6; Z = 3.8 km 1 EQ ~12 km SSW of the summit ML -0.7; Z = 6.6 km 1 low frequency EQ ~1 km WNW of the summit ML -0.7; Z = 5.4 km Iliamna (4 EQs): 1 EQ ~3 km SE of the summit ML -0.6; Z = -0.2 km 1 EQ ~2 km SW of the summit ML -0.8; Z = 4.6 km 1 EQ ~2 km SSE of the summit ML -0.9; Z = -0.2 km 1 EQ ~2 km NNE of the summit ML -1.0; Z = -0.8 km Great Sitkin: 1 EQ ~4 km WSW of the summit ML 1.4; Z = 6.3 km Makushin: 1 EQ ~18 km E of the summit ML 1.1; Z = 4.2 km Snowy: 1 EQ ~23 km SSE of the summit ML 0.4; Z = 5.2 km Fourpeaked: 1 EQ ~10 km SW of the summit ML 0.8; Z = 13.2 km Attachments: This message is posted in the AVO Logs at https://www.avo.alaska.edu/admin/logs/posts/show/454521 _______________________________________________ Avo_ops mailing list -- avo_ops(a)list.avo.alaska.edu To unsubscribe send an email to avo_ops-leave(a)list.avo.alaska.edu

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[AVO-OPS] AVO RSDB- 28 Dec 2025 satellite report
by Jordan Lubbers via Avo_ops 28 Dec '25

28 Dec '25

Associated Keywords: Cloud cover: partly cloudy; Associated Images: https://www.avo.alaska.edu/admin/rsdb/files/show/62937 : shishaldin_islz-20251228T193000Z.jpg Associated Keywords: Volcanic clouds: steam/water; Cloud cover: partly cloudy; VIIRS data still out in VolcView - limited to AVHRR and TROPOMI. To view these and other satellite data, please use http://volcview.wr.usgs.gov/ Duty person can be reached at (907) 786-7481 if you have any questions. Last image viewed: 28 Dec 2025 19:20 UTC _______________________________________________ Avo_ops mailing list -- avo_ops(a)list.avo.alaska.edu To unsubscribe send an email to avo_ops-leave(a)list.avo.alaska.edu

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[AVO-OPS] AVO LOG- Reply to: Reply to: Fee traveling 12/14-27, Ronni and Jessica Acting CS
by logs--- via Avo_ops 28 Dec '25

28 Dec '25

Posted by: David Fee (dfee1(a)alaska.edu), Sun Dec 28, 2025 06:16 (0616 UTC)-- I am back in town and have resumed CS duties. Thanks Ronni and Jess! Attachments: This message is posted in the AVO Logs at https://www.avo.alaska.edu/admin/logs/posts/show/454516 _______________________________________________ Avo_ops mailing list -- avo_ops(a)list.avo.alaska.edu To unsubscribe send an email to avo_ops-leave(a)list.avo.alaska.edu

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[AVO-OPS] AVO RSDB- 27 Dec 2025 satellite report
by Jordan Lubbers via Avo_ops 27 Dec '25

27 Dec '25

Associated Keywords: Cloud cover: partly cloudy; Associated Keywords: Cloud cover: partly cloudy; VIIRS data not being brought in to AVO-VolcView. This report is limited to AVHRR, TROPOMI, AshCam, and available data from the last day from Sentinel-2/Maxar. To view these and other satellite data, please use http://volcview.wr.usgs.gov/ Duty person can be reached at (907) 786-7481 if you have any questions. Last image viewed: 27 Dec 2025 19:31 UTC _______________________________________________ Avo_ops mailing list -- avo_ops(a)list.avo.alaska.edu To unsubscribe send an email to avo_ops-leave(a)list.avo.alaska.edu

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