Newest sealed read: 2026-08-30. We read this source about once a day. We hold 102 sealed runs going back to 2026-06-23.
What this page is137 rows held · newest sealed read 2026-08-30
- We caught USGS revising 137 California earthquakes, out of 248 revisions we caught anywhere.
- In California, the magnitude moved on 36 of them, the depth on 51, and the place on 21.
- We hold a dated copy of 6,059 separate California events, out of 14,785 events across every region.
- Our oldest sealed copy is 23 Jun 2026 and our newest one is 30 Aug 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 1,649 of 14,785 events, and a single copy for the other 13,136. 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 USGS publishes this history itself, including superseded versions, so we do not charge for it.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 137 shown; the file you buy carries all 137. 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 – 30 Aug 2026
| USGS event id | Where USGS said it was | What USGS changed | First read | Second read |
|---|---|---|---|---|
| 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 |
| ci41537064 | 5 km SSE of Home Gardens, CA | magnitude 1.71 → 1.68; depth in km 2.46 → -0.53; place 5 km SSE of Home Gardens, CA → 4 km SE of Home Gardens, CA; and 6 more values moved | 26 Aug 2026 | 27 Aug 2026 |
| nn00923862 | 1 km SE of Johnstonville, California | magnitude 1.67 → 1.53; depth in km 3.492 → 5.3265; place 1 km SE of Johnstonville, California → 10 km NW of Susanville, California; and 6 more values moved | 25 Aug 2026 | 26 Aug 2026 |
| ci41536328 | 7 km SSW of Mojave, CA | magnitude 0.97 → 0.94; depth in km 0.21 → -0.83; place 7 km SSW of Mojave, CA → 7 km S of Mojave, CA; and 5 more values moved | 25 Aug 2026 | 26 Aug 2026 |
| ci41529704 | 1 km NE of Glendale, CA | magnitude 1.04 → 0.83; depth in km 7.88 → 11.96; place 1 km NE of Glendale, CA → 2 km NNE of Silver Lake, CA; and 6 more values moved | 18 Aug 2026 | 19 Aug 2026 |
| ci41537920 | 1 km ENE of Anza, CA | magnitude 0.21 → 0.14; depth in km 8.21 → 8.81; place 1 km ENE of Anza, CA → 1 km E of Anza, CA; and 5 more values moved | 28 Aug 2026 | 29 Aug 2026 |
| ci41537784 | 11 km NW of Ocotillo Wells, CA | magnitude 1.14 → 1.15; depth in km 9.49 → 10.21; place 11 km NW of Ocotillo Wells, CA → 11 km NNW of Ocotillo Wells, CA; and 4 more values moved | 27 Aug 2026 | 28 Aug 2026 |
| ci41536312 | 8 km E of Lebec, CA | magnitude 1.53 → 1.24; depth in km 0.38 → -1.19; kind of event earthquake → quarry blast; and 5 more values moved | 25 Aug 2026 | 26 Aug 2026 |
| ci41536112 | 7 km WSW of Brawley, CA | magnitude 1.16 → 1.01; depth in km 8.9 → 11.05; place 7 km WSW of Brawley, CA → 6 km WSW of Brawley, CA; and 5 more values moved | 25 Aug 2026 | 26 Aug 2026 |
| ci41536096 | 10 km WSW of Pinon Hills, CA | magnitude 1.57 → 1.44; depth in km 7.37 → 7.78; review status automatic → reviewed; and 5 more values moved | 25 Aug 2026 | 26 Aug 2026 |
| ci41536080 | 19 km WSW of Johannesburg, CA | magnitude 0.94 → 0.92; depth in km 7.17 → 6.91; place 19 km WSW of Johannesburg, CA → 18 km WSW of Johannesburg, CA; and 5 more values moved | 25 Aug 2026 | 26 Aug 2026 |
The largest California events we hold a dated copy of. 12 of 6,059 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 – 30 Aug 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 |
| nc75393566 | 11 km N of Covelo, CA | 4.42 | 11 Jul 2026 |
| nc75412157 | 31 km NNW of Covelo, CA | 4.41 | 6 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 |
| nc75412167 | 31 km NNW of Covelo, CA | 3.88 | 6 Aug 2026 |
| nc75388321 | 15 km NNE of Alder Springs, CA | 3.85 | 3 Jul 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 12 of our 60 consecutive day pairs had one in common. A before and an after exists only where two runs landed closer together than usual.
- 13,136 of the 14,785 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 “14 km W of Mojave, 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.
What you would be paying for: Not for sale. USGS publishes this history itself, superseded versions included, so there is nothing here to charge for. Email us an event id and we tell you which dated copies we hold for it, at no charge. A person emails you the sealed copies we hold for the event you name, with the date we sealed each one. No payment is involved.
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.