December 2025 - Avo-usgs - list.avo.alaska.edu

[AVO-OPS] AVO RSDB- 12 Dec 2025 satellite report
by Chris Waythomas via Avo_ops 12 Dec '25

12 Dec '25

Associated Keywords: Cloud cover: cloudy; Associated Images: https://www.avo.alaska.edu/admin/rsdb/files/show/62912 : 375mAKSH-VIS-d20251211t2355583116Z.png https://www.avo.alaska.edu/admin/rsdb/files/show/62913 : 375mAKSH-MIR-d20251212t1159250338Z.png Associated Keywords: Volcanic clouds: steam/water; Elevated surface temperatures: barely elevated; Cloud cover: partly cloudy; mostly clear; 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: 12 Dec 2025 14:50 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 - 12/11/2025
by logs--- via Avo_ops 12 Dec '25

12 Dec '25

Posted by: Matthew Haney (mhaney(a)usgs.gov), Fri Dec 12, 2025 01:57 (0157 UTC)-- "Significant" located earthquakes for December 11, 2025 (picking by Scott Stihler): Iliamna: 7; Martin: 5; Katmai: 3; Edgecumbe: 2; Redoubt: 2; Semisopochnoi: 2; Augustine: 1; Little Sitkin: 1; Novarupta: 1; Okmok: 1; Spurr: 1; Tanaga: 1 ======================== Iliamna (7 EQs): 1 EQ ~4 km ENE of the summit ML -0.4; Z = 2.1 km 1 EQ ~4 km NE of the summit ML -0.4; Z = 2.2 km 1 EQ ~2 km NE of the summit ML -0.5; Z = 1.7 km 1 EQ ~3 km S of the summit ML -0.5; Z = 0.7 km 1 EQ ~1 km NNE of the summit ML -0.9; Z = -1.0 km 1 EQ ~2 km SSW of the summit ML -0.9; Z = 0.8 km 1 EQ ~2 km SE of the summit ML -0.9; Z = 0.4 km Martin (5 EQs): 1 EQ ~2 km N of the summit ML 1.4; Z = 2.8 km 1 EQ ~0 km ESE of the summit ML 1.2; Z = 0.0 km 1 EQ ~2 km N of the summit ML 0.9; Z = 1.0 km 1 EQ ~0 km NNW of the summit ML 0.3; Z = 1.7 km 1 EQ ~1 km NW of the summit ML 0.1; Z = 2.0 km Katmai (3 EQs): 1 EQ ~2 km NW of the summit ML 0.5; Z = 2.9 km 1 EQ ~3 km NW of the summit ML -0.0; Z = 3.1 km 1 EQ ~2 km WNW of the summit ML -0.1; Z = 3.7 km Edgecumbe (2 EQs): 1 EQ ~3 km NE of the summit ML 0.3; Z = 8.3 km 1 EQ ~4 km N of the summit ML 0.1; Z = 6.0 km Redoubt (2 EQs): 1 EQ ~17 km ENE of the summit ML 0.5; Z = 13.5 km 1 low frequency EQ ~2 km SSW of the summit ML -0.6; Z = -0.8 km Semisopochnoi (2 EQs): 1 EQ ~12 km SSW of the Mount Young ML 2.1; Z = 11.5 km 1 low frequency EQ ~15 km SW of the Mount Young ML 1.9; Z = 8.4 km Augustine: 1 EQ ~1 km SW of the summit ML -0.3; Z = -0.1 km Little Sitkin: 1 EQ ~4 km SW of the summit ML 0.7; Z = 1.1 km Novarupta: 1 EQ ~2 km NNW of the 1912 dome ML -0.9; Z = 0.4 km Okmok: 1 EQ ~7 km ENE of the center of caldera ML -0.8; Z = 0.1 km Spurr: 1 low frequency EQ ~3 km N of the summit ML 0.8; Z = 1.9 km Tanaga: 1 EQ ~1 km N of the summit ML 0.8; Z = 5.4 km Attachments: This message is posted in the AVO Logs at https://www.avo.alaska.edu/admin/logs/posts/show/454395 _______________________________________________ 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 - 12/10/2025
by logs--- via Avo_ops 12 Dec '25

12 Dec '25

Posted by: Matthew Haney (mhaney(a)usgs.gov), Fri Dec 12, 2025 01:55 (0155 UTC)-- "Significant" located earthquakes for December 10, 2025 (picking by Scott Stihler): Iliamna: 5; Novarupta: 4; Redoubt: 4; Gareloi: 2; Semisopochnoi: 2; Augustine: 1; Great Sitkin: 1; Martin: 1; Wrangell: 1; Steller: 1 ======================== Iliamna (5 EQs): 1 low frequency EQ ~5 km ENE of the summit ML -0.2; Z = 6.2 km 1 EQ ~4 km ENE of the summit ML -0.7; Z = 1.3 km 1 EQ ~3 km NNE of the summit ML -0.7; Z = 2.0 km 1 EQ ~2 km ESE of the summit ML -0.8; Z = 0.9 km 1 EQ ~2 km SSW of the summit ML -1.0; Z = 0.7 km Novarupta (4 EQs): 1 low frequency EQ ~4 km N of the 1912 dome ML -0.2; Z = 5.5 km 1 low frequency EQ ~4 km NE of the 1912 dome ML -0.3; Z = 6.9 km 1 EQ ~3 km WNW of the 1912 dome ML -0.5; Z = -0.2 km 1 low frequency EQ ~4 km N of the 1912 dome ML -0.6; Z = 2.5 km Redoubt (4 EQs): 1 EQ ~7 km NNW of the summit ML 0.6; Z = 5.6 km 1 EQ ~17 km ENE of the summit ML 0.4; Z = 13.3 km 1 EQ ~14 km NW of the summit ML 0.3; Z = 9.1 km 1 EQ ~4 km NE of the summit ML -0.8; Z = 2.3 km Gareloi (2 EQs): 1 EQ ~9 km W of the summit ML 1.1; Z = 7.4 km 1 EQ ~9 km WNW of the summit ML 0.5; Z = 8.0 km Semisopochnoi (2 EQs): 1 EQ ~15 km SSW of the Mount Young ML 1.6; Z = 2.8 km 1 low frequency EQ ~4 km SW of the Mount Young ML 1.4; Z = 7.6 km Augustine: 1 EQ ~0 km SW of the summit ML 0.4; Z = -0.0 km Great Sitkin: 1 low frequency EQ ~5 km WNW of the summit ML 0.2; Z = 9.2 km Martin: 1 EQ ~2 km ESE of the summit ML 0.0; Z = -0.2 km Wrangell: 1 moderately deep low frequency EQ ~5 km N of the summit ML 1.5; Z = 12.1 km Steller: 1 EQ ~9 km SW of the summit ML 0.1; Z = -2.1 km Attachments: This message is posted in the AVO Logs at https://www.avo.alaska.edu/admin/logs/posts/show/454394 _______________________________________________ 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 - 12/07/2025
by logs--- via Avo_ops 11 Dec '25

11 Dec '25

Posted by: cheryl searcy (csearcy(a)usgs.gov), Thu Dec 11, 2025 20:34 (2034 UTC)-- "Significant" located earthquakes for December 7, 2025: (picking by Cheryl Searcy) Spurr: 4; Iliamna: 2; Katmai: 2; Martin: 2; Okmok: 1; Semisopochnoi: 1 ======================== Spurr (4 EQs): 1 EQ ~3 km NNE of the summit ML 0.9; Z = -1.5 km 1 EQ ~3 km N of the summit ML 0.7; Z = 0.5 km 1 EQ ~3 km NNE of the summit ML 0.5; Z = 0.6 km 1 EQ ~4 km N of the summit ML 0.1; Z = -2.5 km Iliamna (2 EQs): 1 EQ ~6 km ENE of the summit ML -0.2; Z = 6.4 km 1 EQ ~4 km NNE of the summit ML -0.4; Z = 1.3 km Katmai (2 EQs): 1 EQ ~8 km ENE of the summit ML 1.5; Z = 4.9 km 1 EQ ~3 km SSW of the summit ML -0.0; Z = 4.8 km Martin (2 EQs): 1 EQ ~1 km WSW of the summit ML -0.1; Z = 1.4 km 1 EQ ~1 km SW of the summit ML -0.3; Z = 1.0 km Okmok: 1 EQ ~4 km SE of the center of caldera ML 0.6; Z = 3.8 km Semisopochnoi: 1 moderately deep low frequency EQ ~17 km SW of the Mount Young ML 2.1; Z = 11.9 km Attachments: This message is posted in the AVO Logs at https://www.avo.alaska.edu/admin/logs/posts/show/454392 _______________________________________________ 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 - 12/09/2025
by logs--- via Avo_ops 11 Dec '25

11 Dec '25

Posted by: Matthew Haney (mhaney(a)usgs.gov), Thu Dec 11, 2025 18:45 (1845 UTC)-- "Significant" located earthquakes for December 9, 2025 (picking by Scott Stihler): Iliamna: 5; Martin: 5; Katmai: 4; Great Sitkin: 2; Shishaldin: 2; Snowy: 2; Redoubt: 1; Semisopochnoi: 1; Spurr: 1; Wrangell: 1 ======================== Iliamna (5 EQs): 1 EQ ~2 km ENE of the summit ML -0.6; Z = 0.6 km 1 EQ ~3 km NE of the summit ML -0.8; Z = 1.3 km 1 low frequency EQ ~2 km ESE of the summit ML -0.9; Z = 2.7 km 1 EQ ~4 km ENE of the summit ML -0.9; Z = -0.6 km 1 low frequency EQ ~1 km ENE of the summit ML -1.0; Z = -0.1 km Martin (5 EQs): 1 EQ ~2 km ESE of the summit ML 0.6; Z = 2.4 km 1 EQ ~2 km ENE of the summit ML 0.0; Z = 2.1 km 1 EQ ~2 km E of the summit ML -0.3; Z = -1.4 km 1 EQ ~2 km ESE of the summit ML -0.3; Z = 2.3 km 1 EQ ~2 km ESE of the summit ML -0.3; Z = 1.4 km Katmai (4 EQs): 1 EQ ~3 km NW of the summit ML 0.1; Z = 3.5 km 1 EQ ~2 km WNW of the summit ML 0.1; Z = 2.9 km 1 EQ ~2 km ESE of the summit ML 0.0; Z = 5.2 km 1 EQ ~10 km NNE of the summit ML -0.1; Z = 4.2 km Great Sitkin (2 EQs): 1 low frequency EQ ~3 km W of the summit ML 0.8; Z = 3.2 km 1 EQ ~3 km NW of the summit ML 0.3; Z = -1.8 km Shishaldin (2 EQs): 1 low frequency EQ ~12 km SW of the summit ML 1.4; Z = 9.1 km 1 moderately deep low frequency EQ ~7 km W of the summit ML 1.2; Z = 19.3 km Snowy (2 EQs): 1 EQ ~8 km WSW of the summit ML 0.8; Z = 3.1 km 1 EQ ~15 km S of the summit ML 0.6; Z = 8.1 km Redoubt: 1 EQ ~6 km N of the summit ML 0.5; Z = 4.7 km Semisopochnoi: 1 moderately deep low frequency EQ ~4 km SW of Mount Young ML 1.5; Z = 16.3 km Spurr: 1 EQ ~5 km WNW of the summit ML -0.4; Z = -2.5 km Wrangell: 1 low frequency EQ ~4 km SSW of the summit ML 0.5; Z = 9.6 km Attachments: This message is posted in the AVO Logs at https://www.avo.alaska.edu/admin/logs/posts/show/454391 _______________________________________________ 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- 11 Dec 2025 satellite report
by Chris Waythomas via Avo_ops 11 Dec '25

11 Dec '25

Associated Keywords: Cloud cover: cloudy; Associated Images: https://www.avo.alaska.edu/admin/rsdb/files/show/62911 : 375mAKSH-VIS-d20251211t0037974502Z.png Associated Keywords: Volcanic clouds: steam/water; Cloud cover: mostly clear; Katmai SIGMET has expired. 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: 11 Dec 2025 14:19 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 RSDB- 10 Dec 2025 satellite report
by Chris Waythomas via Avo_ops 10 Dec '25

10 Dec '25

Associated Images: https://www.avo.alaska.edu/admin/rsdb/files/show/62908 : 375mAKKN-MIR-d20251210t1348096202Z.png Associated Keywords: Elevated surface temperatures: barely elevated; Cloud cover: cloudy; partly cloudy; Associated Images: https://www.avo.alaska.edu/admin/rsdb/files/show/62909 : 375mAKSH-VIS-d20251209t2221973111Z.png https://www.avo.alaska.edu/admin/rsdb/files/show/62910 : SO2-VIIRS-2025_12_09_225154-Eastern Aleutians.png Associated Keywords: Volcanic clouds: SO2 signal; Cloud cover: mostly clear; 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: 10 Dec 2025 14:38 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 - 12/08/2025
by logs--- via Avo_ops 10 Dec '25

10 Dec '25

Posted by: Matthew Haney (mhaney(a)usgs.gov), Wed Dec 10, 2025 03:15 (0315 UTC)-- "Significant" located earthquakes for December 8, 2025 (picking by Scott Stihler): Katmai: 4; Shishaldin: 3; Iliamna: 2; Semisopochnoi: 2; Spurr: 2; Edgecumbe: 1; Makushin: 1; Trident: 1 ======================== Katmai (4 EQs): 1 EQ ~2 km E of the summit ML 0.1; Z = 5.0 km 1 EQ ~2 km E of the summit ML -0.0; Z = 5.4 km 1 EQ ~2 km ESE of the summit ML -0.1; Z = 6.4 km 1 EQ ~2 km E of the summit ML -0.5; Z = 6.2 km Shishaldin (3 EQs): 1 low frequency EQ ~2 km NE of the summit ML 1.2; Z = 9.2 km 1 low frequency EQ ~1 km W of the summit ML 1.1; Z = 0.4 km 1 EQ ~0 km NW of the summit ML 0.7; Z = -1.1 km Iliamna (2 EQs): 1 low frequency EQ ~6 km NW of the summit ML -0.4; Z = 9.4 km 1 low frequency EQ ~1 km NNE of the summit ML -1.2; Z = -0.4 km Semisopochnoi (2 EQs): 1 low frequency EQ ~8 km ESE of Mount Young ML 2.1; Z = 3.9 km 1 low frequency EQ ~4 km SW of Mount Young ML 1.8; Z = 3.5 km Spurr (2 EQs): 1 EQ ~17 km S of the summit ML -0.2; Z = 5.7 km 1 EQ ~18 km S of the summit ML -0.3; Z = 5.8 km Edgecumbe: 1 EQ ~5 km E of the summit ML 0.5; Z = 7.4 km Makushin: 1 EQ ~10 km ESE of the summit ML 0.1; Z = 3.5 km Trident: 1 low frequency EQ ~5 km E of the summit ML 0.1; Z = 8.5 km Attachments: This message is posted in the AVO Logs at https://www.avo.alaska.edu/admin/logs/posts/show/454378 _______________________________________________ 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 - 12/06/2025
by logs--- via Avo_ops 09 Dec '25

09 Dec '25

Posted by: Matthew Haney (mhaney(a)usgs.gov), Tue Dec 9, 2025 23:56 (2356 UTC)-- "Significant" located earthquakes for December 6, 2025 (picking by Scott Stihler): Iliamna: 15; Katmai: 6; Novarupta: 2; Redoubt: 2; Spurr: 2; Augustine: 1; Edgecumbe: 1; Martin: 1; Okmok: 1; Moffett: 1 ======================== Iliamna (15 EQs): 1 EQ ~1 km S of the summit ML 1.4; Z = 0.3 km 1 EQ ~9 km SW of the summit ML -0.2; Z = 11.3 km 1 low frequency EQ ~2 km ENE of the summit ML -0.3; Z = -2.6 km 1 EQ ~2 km SE of the summit ML -0.3; Z = -0.6 km 1 EQ ~2 km N of the summit ML -0.4; Z = 0.2 km 1 low frequency EQ ~2 km SSW of the summit ML -0.5; Z = 6.4 km 1 low frequency EQ ~1 km NNE of the summit ML -0.7; Z = 0.0 km 1 EQ ~4 km SSW of the summit ML -0.7; Z = 2.5 km 1 EQ ~2 km SSW of the summit ML -0.8; Z = -0.4 km 1 EQ ~3 km SSW of the summit ML -0.8; Z = -0.2 km 1 EQ ~1 km N of the summit ML -0.8; Z = 0.1 km 1 EQ ~5 km S of the summit ML -0.8; Z = 2.9 km 1 EQ ~1 km NE of the summit ML -0.9; Z = 3.6 km 1 EQ ~3 km ESE of the summit ML -0.9; Z = -1.8 km 1 EQ ~3 km SE of the summit ML -0.9; Z = -0.3 km Katmai (6 EQs): 1 moderately deep low frequency EQ ~9 km SSE of the summit ML 0.3; Z = 10.8 km 1 EQ ~3 km NNW of the summit ML 0.2; Z = 4.1 km 1 EQ ~2 km NNW of the summit ML -0.3; Z = 4.1 km 1 EQ ~0 km S of the summit ML -0.4; Z = 3.3 km 1 EQ ~4 km W of the summit ML -0.6; Z = 1.9 km 1 EQ ~3 km WNW of the summit ML -0.8; Z = 3.3 km Novarupta (2 EQs): 1 EQ ~0 km WSW of the 1912 dome ML -0.2; Z = 4.5 km 1 low frequency EQ ~3 km NE of the 1912 dome ML -0.4; Z = 6.6 km Redoubt (2 EQs): 1 EQ ~3 km N of the summit ML -0.3; Z = 0.5 km 1 EQ ~5 km NNE of the summit ML -0.7; Z = 5.1 km Spurr (2 EQs): 1 EQ ~14 km S of the summit ML 1.0; Z = 7.1 km 1 EQ ~14 km S of the summit ML -0.3; Z = 5.9 km Augustine: 1 EQ ~1 km SSW of the summit ML 0.4; Z = 0.3 km Edgecumbe: 1 EQ ~3 km NNE of the summit ML 0.6; Z = 7.7 km Martin: 1 EQ ~3 km E of the summit ML -0.0; Z = 3.5 km Okmok: 1 EQ ~7 km WSW of the center of caldera ML -0.2; Z = 3.2 km Moffett: 1 EQ ~10 km SE of the summit ML 1.3; Z = 0.9 km Attachments: This message is posted in the AVO Logs at https://www.avo.alaska.edu/admin/logs/posts/show/454377 _______________________________________________ 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- 2026 Field Season Planning: Process for Fieldwork Unrelated to Network Maintenance
by logs--- via Avo_ops 09 Dec '25

09 Dec '25

Posted by: Matthew Haney (mhaney(a)usgs.gov), Tue Dec 9, 2025 23:16 (2316 UTC)-- Hi everyone - As done last year, we're asking for 1 to 2 page whitepapers for any proposed field projects in 2026 that aren't directly related to maintenance of the real-time network. Examples of such projects in the past have included: -Geological field work -Measurements of volcanic gas emissions -Campaign GPS measurements We invite any members of AVO to submit a proposed project using the attached template by emailing it to the leadership of AVO (David Fee, Scott Crass, and Matt Haney) by COB January 9. Our email addresses are copied below. We will evaluate the proposals and decide which ones to proceed with by the time of the AVO Coordination Meeting on Jan. 27-28. The AVO field season will need to be run very efficiently in 2026 and therefore we don't expect to go ahead with projects that require substantial additional resources. Copied below is the current "strawman" schedule for network maintenance in 2026, which is in the same directory on the AVO Sharepoint as was used for the Field Season Wrap-Up Meeting. The whitepaper template is also copied in that directory. The geology group at AVO has been using a similar process as described here for many years and this effort is synergistic with that process. Sincerely, Matt (mhaney(a)usgs.gov), David (dfee1(a)alaska.edu), and Scott Crass (scott.crass(a)alaska.gov) 2026 Network Maintenance Strawman Schedule: https://doimspp.sharepoint.com/:x:/r/sites/GS-VSCAVOall/Shared%20Documents/… Attachments: https://www.avo.alaska.edu/admin/logs/files/show/163708 AVO_1to2page_whitepaper_Template.docx This message is posted in the AVO Logs at https://www.avo.alaska.edu/admin/logs/posts/show/454376 _______________________________________________ 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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