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 is541 rows held · newest sealed read 2026-10-15
- We caught USGS revising 541 California earthquakes, out of 998 revisions we caught anywhere.
- In California, the magnitude moved on 208 of them, the depth on 297, and the place on 101.
- We hold a dated copy of 10,063 separate California 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 USGS publishes this history itself, including superseded versions, so we do not charge for it.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 California. 12 of 541 shown; the file you buy carries all 541. 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 |
|---|---|---|---|---|
| ci41336319 | 7 km ESE of Chula Vista, CA | magnitude 0.89 → 0.75; depth in km 4.2 → -0.26; place 7 km ESE of Chula Vista, CA → 8 km ESE of Bonita, CA; and 7 more values moved | 21 Sep 2026 | 22 Sep 2026 |
| ci41536376 | 14 km W of Mojave, CA | magnitude 0.97 → 1.01; depth in km -0.82 → -1.01; place 14 km W of Mojave, CA → 13 km W of Mojave, CA; and 7 more values moved | 25 Aug 2026 | 26 Aug 2026 |
| ci41529648 | 3 km ENE of Rancho San Diego, CA | magnitude 1.45 → 1.44; depth in km 5.04 → -0.26; place 3 km ENE of Rancho San Diego, CA → 5 km SE of Bostonia, CA; and 6 more values moved | 18 Aug 2026 | 19 Aug 2026 |
| ci41346935 | 8 km SW of Anza, CA | magnitude 0.37 → 0.04; depth in km 6.17 → 4.32; place 8 km SW of Anza, CA → 7 km SW of Anza, CA; and 6 more values moved | 13 Oct 2026 | 14 Oct 2026 |
| ci41346743 | 8 km N of Imperial, CA | magnitude 1.51 → 1.47; depth in km 15.72 → 10.3; place 8 km N of Imperial, CA → 4 km SSE of Brawley, CA; and 6 more values moved | 12 Oct 2026 | 13 Oct 2026 |
| ci41346711 | 7 km S of Beaumont, CA | magnitude 0.83 → 0.9; depth in km 22.37 → 17.65; place 7 km S of Beaumont, CA → 2 km E of Loma Linda, CA; and 6 more values moved | 12 Oct 2026 | 13 Oct 2026 |
| ci41343879 | 12 km NE of Warner Springs, CA | magnitude 0.09 → 0.06; depth in km 19.11 → 7.08; place 12 km NE of Warner Springs, CA → 15 km SSE of Anza, CA; and 5 more values moved | 6 Oct 2026 | 7 Oct 2026 |
| ci41342719 | 4 km NE of California City, CA | magnitude 1.50846569297704 → 1.69; depth in km 9.86999988555908 → 6.4; place 4 km NE of California City, CA → 16 km WSW of Johannesburg, CA; and 6 more values moved | 4 Oct 2026 | 5 Oct 2026 |
| ci41340775 | 16 km NNE of Borrego Springs, CA | magnitude 0.69 → 0.67; depth in km 11.24 → 12.34; place 16 km NNE of Borrego Springs, CA → 17 km NNE of Borrego Springs, CA; and 5 more values moved | 30 Sep 2026 | 1 Oct 2026 |
| ci41337479 | 17 km NE of Warner Springs, CA | magnitude 0.34 → 0.15; depth in km 13.97 → 7.43; place 17 km NE of Warner Springs, CA → 12 km SSE of Anza, CA; and 6 more values moved | 23 Sep 2026 | 24 Sep 2026 |
| ci41337335 | 4 km S of San Diego Country Estates, CA | magnitude 1.39 → 1.1; depth in km 7.85 → 11.77; place 4 km S of San Diego Country Estates, CA → 11 km NNW of Ocotillo, CA; and 6 more values moved | 23 Sep 2026 | 24 Sep 2026 |
| ci41336695 | 14 km N of Warner Springs, CA | magnitude 1.48515504329768 → -0.06; depth in km 7.51999998092651 → 6.5; place 14 km N of Warner Springs, CA → 15 km N of Warner Springs, CA; and 6 more values moved | 22 Sep 2026 | 23 Sep 2026 |
The largest California events we hold a dated copy of. 12 of 10,063 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 |
|---|---|---|---|
| nc75382936 | 11 km N of Redwood Valley, CA | 5.59 | 25 Jun 2026 |
| nc75426637 | 95 km W of Petrolia, CA | 4.84 | 29 Aug 2026 |
| nc75444322 | 97 km W of Petrolia, CA | 4.77 | 29 Sep 2026 |
| nc75393566 | 11 km N of Covelo, CA | 4.42 | 11 Jul 2026 |
| nc75412157 | 31 km NNW of Covelo, CA | 4.41 | 6 Aug 2026 |
| us7000td35 | 184 km W of Ferndale, California | 4.4 | 31 Aug 2026 |
| ci41292687 | 18 km WSW of Johannesburg, CA | 4.31762677888687 | 14 Jul 2026 |
| nc75407577 | 8 km ESE of Cloverdale, CA | 4.26 | 29 Jul 2026 |
| ci41291863 | 2 km ESE of Frazier Park, CA | 4.1816630290851 | 12 Jul 2026 |
| nc75411492 | 31 km NNW of Covelo, CA | 3.99 | 5 Aug 2026 |
| ci41533416 | 10 km ENE of Coso Junction, CA | 3.96264786337985 | 24 Aug 2026 |
| nc75415717 | 5 km NW of Pinnacles, CA | 3.94 | 11 Aug 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 “7 km ESE of Chula Vista, CA”. 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 California 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.