Newest sealed read: 2026-10-15. We read this source about once a day. We hold 310 sealed runs going back to 2026-06-23.
What this page is139 rows held · newest sealed read 2026-10-15
- We caught USGS revising 139 Alaska earthquakes, out of 998 revisions we caught anywhere.
- In Alaska, the magnitude moved on 80 of them, the depth on 124, and the place on 92.
- We hold a dated copy of 6,409 separate Alaska events, out of 26,355 events across every region.
- Our oldest sealed copy is 23 Jun 2026 and our newest one is 15 Oct 2026. Reading was switched back on by a dated decision on 23 Aug 2026, after a pause, so this list can still grow.
- We hold two or more dated copies for 11,436 of 26,355 events, and a single copy for the other 14,919. Where we hold two copies you can see what changed between them; where we hold one there is nothing to compare it with. USGS publishes this history itself, including superseded versions, so we do not charge for it.
Real rows out of our sealed copies
These are rows we read out of dated copies we keep ourselves. The live source shows today only, so once a row moves, what it said before is gone from the place you would go to look.
Real revisions we caught in Alaska. 12 of 139 shown; the file you buy carries all 139. Numbers are printed exactly as USGS published them, long decimals and all. We do not round, because the value USGS actually put out is the whole point of the archive.
23 Jun 2026 – 15 Oct 2026
| USGS event id | Where USGS said it was | What USGS changed | First read | Second read |
|---|---|---|---|---|
| aka2026txinfz | 86 km NW of Karluk, Alaska | magnitude 1.1 → 1.2; depth in km 5.0 → 3.5; place 86 km NW of Karluk, Alaska → 87 km NW of Karluk, Alaska; and 6 more values moved | 8 Oct 2026 | 9 Oct 2026 |
| aka2026susmgb | 42 km NE of Ambler, Alaska | magnitude 3.6 → 3.5; depth in km 26.0 → 5.0; place 42 km NE of Ambler, Alaska → 41 km NE of Ambler, Alaska; and 6 more values moved | 22 Sep 2026 | 23 Sep 2026 |
| aka2026rsblne | 121 km S of Yakutat, Alaska | magnitude 3.7 → 4.0; depth in km 5.0 → 16.1; place 121 km S of Yakutat, Alaska → 152 km WSW of Elfin Cove, Alaska; and 6 more values moved | 7 Sep 2026 | 8 Sep 2026 |
| aka2026rnwxzf | 185 km SE of Perryville, Alaska | magnitude 3.6 → 3.5; depth in km 5.0 → 28.5; place 185 km SE of Perryville, Alaska → 184 km SE of Perryville, Alaska; and 6 more values moved | 4 Sep 2026 | 5 Sep 2026 |
| aka2026rnhsox | 45 km NW of Skwentna, Alaska | magnitude 1.4 → 1.6; depth in km 26.8 → 5.6; place 45 km NW of Skwentna, Alaska → 52 km WNW of Skwentna, Alaska; and 6 more values moved | 4 Sep 2026 | 5 Sep 2026 |
| aka2026rmpjyd | 30 km E of Denali Park, Alaska | magnitude 2.3 → 2.2; depth in km 84.6 → 86.2; place 30 km E of Denali Park, Alaska → 31 km ESE of Denali Park, Alaska; and 6 more values moved | 4 Sep 2026 | 5 Sep 2026 |
| aka2026rickef | 119 km NW of Yakutat, Alaska | magnitude 1.4 → 1.5; depth in km 5.0 → 18.1; place 119 km NW of Yakutat, Alaska → 115 km NW of Yakutat, Alaska; and 6 more values moved | 1 Sep 2026 | 2 Sep 2026 |
| aka2026rbikti | 17 km WNW of Ivanof Bay, Alaska | magnitude 2.2 → 2.5; depth in km 5.0 → 11.0; place 17 km WNW of Ivanof Bay, Alaska → 14 km WNW of Ivanof Bay, Alaska; and 6 more values moved | 29 Aug 2026 | 30 Aug 2026 |
| aka2026rbbxfx | 56 km S of Ivanof Bay, Alaska | magnitude 2.1 → 2.4; depth in km 26.0 → 15.3; place 56 km S of Ivanof Bay, Alaska → 57 km S of Ivanof Bay, Alaska; and 6 more values moved | 28 Aug 2026 | 29 Aug 2026 |
| aka2026rbasxy | 50 km NW of Ninilchik, Alaska | magnitude 2.1 → 2.2; depth in km 91.3 → 93.3; place 50 km NW of Ninilchik, Alaska → 48 km NW of Ninilchik, Alaska; and 6 more values moved | 28 Aug 2026 | 29 Aug 2026 |
| aka2026qztdyc | 61 km WNW of Sitka, Alaska | magnitude 1.4 → 1.5; depth in km 7.7 → 11.2; place 61 km WNW of Sitka, Alaska → 62 km WNW of Sitka, Alaska; and 6 more values moved | 28 Aug 2026 | 29 Aug 2026 |
| aka2026qxuwrm | 69 km SSW of Ugashik, Alaska | magnitude 1.2 → 2.1; depth in km 5.0 → 0.8; place 69 km SSW of Ugashik, Alaska → 60 km SE of Ugashik, Alaska; and 6 more values moved | 27 Aug 2026 | 28 Aug 2026 |
The largest Alaska events we hold a dated copy of. 12 of 6,409 shown. Numbers are printed exactly as USGS published them, long decimals and all. We do not round, because the value USGS actually put out is the whole point of the archive.
sealed 23 Jun 2026 – 15 Oct 2026
| USGS event id | Where USGS said it was | Magnitude we hold | Day we sealed it |
|---|---|---|---|
| us7000ti1p | 165 km W of Nikolski, Alaska | 6.5 | 17 Sep 2026 |
| us7000tdvt | 84 km SSW of Nikolski, Alaska | 6.3 | 3 Sep 2026 |
| us7000t3fm | 99 km SE of Atka, Alaska | 5.8 | 26 Jul 2026 |
| aka2026powmkf | 57 km WNW of Skwentna, Alaska | 5.6 | 8 Aug 2026 |
| us7000te4b | 100 km S of Nikolski, Alaska | 5.5 | 3 Sep 2026 |
| aka2026tuxgky | 92 km NNW of Aleneva, Alaska | 5.5 | 6 Oct 2026 |
| us7000tgky | 151 km WSW of Adak, Alaska | 5.3 | 11 Sep 2026 |
| us7000te2m | 104 km SSW of Nikolski, Alaska | 5.3 | 3 Sep 2026 |
| us7000tdab | 89 km SSW of Nikolski, Alaska | 5.3 | 1 Sep 2026 |
| us7000t0b5 | 96 km SE of False Pass, Alaska | 5.3 | 14 Jul 2026 |
| aka2026msxacu | 35 km SSW of Cordova, Alaska | 5.3 | 29 Jun 2026 |
| us7000tdys | 100 km SSW of Nikolski, Alaska | 5.2 | 3 Sep 2026 |
What this page cannot tell you
- We can only show a change between two of our own reads. USGS can revise an event whenever it likes, so if it changed a number and changed it back between two of our reads, we never saw it and it is not on this page.
- Each file we saved holds the last 24 hours of events, and our runs were about 24 hours apart, so two copies sealed on consecutive days usually share no event at all: only 58 of our 106 consecutive day pairs had one in common. A before and an after exists only where two runs landed closer together than usual.
- 14,919 of the 26,355 events we hold were caught on one day only. There is no second reading to compare them with, so they cannot show a revision.
- We ran on 14 Aug 2026, 15 Aug 2026, 16 Aug 2026, 17 Aug 2026 and the feed gave us nothing back, so there is no copy for those days. We say that rather than skipping over it.
- 4 days inside our range have no run at all: 4 Jul 2026, 15 Jul 2026, 22 Aug 2026, 23 Aug 2026.
- We hold what USGS published. We are not saying which reading is right. The current catalogue keeps only the later one.
- The region on this page is read off the place text USGS itself writes, such as “86 km NW of Karluk, Alaska”. We do not put an event in a region USGS did not name.
See the file we hold
You do not have to take our word for what is in the file. Here are 25 rows of the real thing, carrying all 7 of its columns, cut out of the dated copies we sealed ourselves. Nothing in it is made up and nothing in it is tidied up.
- Open the 25 rows as a CSVA plain spreadsheet file. It saves to your machine rather than painting itself into a browser tab, and it opens in Excel, Numbers or Google Sheets.
- The same 25 rows as JSONThe same rows again, laid out for reading with code.
Nothing on this page is for sale. The sample file is free to read, and so is every row on the page above it.
These 25 rows are a slice of the file, not the whole of it. What we cannot show you here is how far back it goes: the file goes back further than these rows do.
Ask what we hold for a named event
No pay button on this one yet. Email operations@ustechautomations.com. We reply with what we hold for this one, and with what we do not hold, before you spend anything.
Email us about the copies we holdSay that you want Alaska earthquake revisions and we will tell you which weeks we hold for it and since when.
More from this feed
- Up one level: Earthquake record archiveThe whole feed, its price, and how the file arrives.
- What is and is not in this feedEvery source we read for it, how often, and the ones we refuse to collect.