Earthquake record › seal of 2026-08-21

The USGS Feed as Sealed on 2026-08-21

284 events, exactly as the feed presented them at the moment we read it. Values on this page are what USGS asserted on this date — some of them have since been revised, and this page deliberately does not follow those revisions.

← 2026-08-20 · 2026-08-24 →

What this archive is, exactly. The USGS all_day feed holds the last 24 hours and is overwritten in place. We seal one dated copy of it per day. An event that appeared in the feed and was superseded between two of our seals is not in this archive at all. These pages are a record of what USGS asserted at each seal — they are not a complete catalogue of earthquakes, and nothing here should be read as one.

No event in this seal had appeared in an earlier one. Every event here was first seen on this date.

Review status as sealed: reviewed 196, automatic 88. An automatic value is a machine solution USGS may still revise; a reviewed value has had a human look at it. Which one you are reading matters more than the magnitude itself.

By magnitude

MagnitudeEvents
Below M1.0105
M1.0 – M1.9109
M2.0 – M2.933
M3.0 – M3.910
M4.0 – M4.917
M5.0 and above10
No magnitude published0

29 of 284 events in this seal were sealed at or above M3.5 — the magnitude Texas Railroad Commission seismic-response conditions are written around. That is a count of what the feed said, not a determination about any permit, operator or well.

Get told when the record changes for your area

USGS publishes the last day and overwrites it, then revises events in place — automatic becomes reviewed, magnitudes move, and the old value stops existing everywhere. We seal a dated copy every day. Leave your email and we'll tell you when an event in your area is revised after the fact, with what it said before.

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Largest events in this seal

MagnitudePlace, as publishedReview statusSeal
M6.7031 km NW of Aniso, Perureviewed2026-08-21
M5.6067 km NNW of Ende, Indonesiareviewed2026-08-21
M5.3048 km NNE of Ruteng, Indonesiareviewed2026-08-21
M5.20270 km SSE of Dunhuang, Chinareviewed2026-08-21
M5.10183 km SE of Kokopo, Papua New Guineareviewed2026-08-21
M5.0037 km NNW of Ruteng, Indonesiareviewed2026-08-21
M5.0043 km N of Ruteng, Indonesiareviewed2026-08-21
M5.0063 km NW of Ende, Indonesiareviewed2026-08-21
M5.0078 km NNW of Ende, Indonesiareviewed2026-08-21
M5.00Pacific-Antarctic Ridgereviewed2026-08-21
M4.90170 km NE of Lorengau, Papua New Guineareviewed2026-08-21
M4.8063 km NNE of Ruteng, Indonesiareviewed2026-08-21
M4.80217 km E of Levuka, Fijireviewed2026-08-21
M4.706 km W of Onna, Japanreviewed2026-08-21
M4.6086 km NNE of Ruteng, Indonesiareviewed2026-08-21
M4.6045 km NNE of Ruteng, Indonesiareviewed2026-08-21
M4.6075 km NW of Ende, Indonesiareviewed2026-08-21
M4.6026 km NNE of Ruteng, Indonesiareviewed2026-08-21
M4.5085 km SSW of Singaparna, Indonesiareviewed2026-08-21
M4.5085 km N of Saipan, Northern Mariana Islandsreviewed2026-08-21

Where they were, as USGS wrote it

State or territoryEvents
California105
Alaska91
Utah16
Hawaii12
Washington10
Texas9
New Mexico6
Nevada3
Oregon3
the U.S. Virgin Islands2
the Northern Mariana Islands1
Puerto Rico1

25 of 284 events in this seal carry a place tail we do not map to a US state — most of them are outside the US. They are counted here and left unassigned rather than guessed at.

How this seal was collected

SealWe read atSource last modifiedHTTPSource
2026-08-212026-08-21T05:41:19+00:00Fri, 21 Aug 2026 05:40:30 GMT200source file
Days we did not seal. 69 seals span 77 calendar days, so these days inside the span have no sealed copy: 2026-07-04, 2026-07-15, 2026-08-14, 2026-08-15, 2026-08-16, 2026-08-17, 2026-08-22, 2026-08-23. A missing day means we did not read the feed. It does not mean nothing happened, and those dates return a 404 here rather than a page reading zero.
One seal is wider than the others. These dates were collected more than once: 2026-07-16 (2 runs, 00:48 and 13:42 UTC), 2026-08-18 (2 runs, 05:41 and 23:15 UTC), 2026-08-24 (12 runs, 00:43 and 11:00 UTC), 2026-08-25 (11 runs, 02:00 and 22:09 UTC), 2026-08-26 (4 runs, 00:05 and 22:05 UTC), 2026-08-27 (4 runs, 00:05 and 22:09 UTC), 2026-08-28 (4 runs, 00:05 and 22:08 UTC), 2026-08-29 (4 runs, 00:08 and 22:05 UTC), 2026-08-30 (4 runs, 00:07 and 22:05 UTC), 2026-08-31 (4 runs, 00:05 and 22:08 UTC), 2026-09-01 (4 runs, 00:06 and 22:10 UTC), 2026-09-02 (4 runs, 00:05 and 22:05 UTC), 2026-09-03 (4 runs, 00:09 and 22:09 UTC), 2026-09-04 (4 runs, 00:07 and 22:08 UTC), 2026-09-05 (4 runs, 00:08 and 22:06 UTC), 2026-09-06 (4 runs, 00:09 and 22:08 UTC), 2026-09-07 (4 runs, 00:09 and 22:05 UTC). A day with two runs covers more than 24 source-hours, so its event count is larger for a collection reason and not a seismic one. Do not read it as a busy day.

Compiled from dated copies of the U.S. Geological Survey's public all_day realtime feed (a work of the US government, in the public domain). Values are reproduced exactly as USGS published them on the date shown and may since have been revised; USGS is the authority on the current value of any event. These pages are provided for informational purposes only, carry no warranty of accuracy or completeness, and are not an earthquake warning, a safety notice, or engineering advice. Always verify against the USGS Earthquake Hazards Program before relying on any figure.

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