# $BIGQUAKE · Big earthquakes worldwide

Earthquakes of magnitude 5 or more anywhere in the world in a month, UTC, as the US Geological Survey's catalogue counts them (event type earthquake, so mine blasts and the like are left out). The two newest months are asked again every day: the Survey reviews events and can add, drop or re-rate one, and the record keeps the revision. Counted from January 2010.

| Field | Value |
| --- | --- |
| Newest complete period | Oct 2026: 223 earthquakes, score 15, Quiet |
| Source | US Geological Survey, ComCat earthquake catalogue, FDSN event count service (https://earthquake.usgs.gov/fdsnws/event/1/) |
| Terms | US government work, public domain (USGS Information Policies). |
| Cadence | Monthly. The Survey posts a large quake within minutes and reviews it within days; a month prints seven days after it ends. |
| Grade | reference |
| Rulebook | Rulebook v0.2, 2026-10-04 |

## Settlement

Why this grade: The US Geological Survey's own catalogue count, public domain. A review can move an event across magnitude 5 after the month prints; the record keeps the revision.
What it costs to move: Not possible. Nobody makes an earthquake.
When the source is late: A month prints seven days after it ends. If the count service answers 0 or fails, the month stays open. A month the Survey never answers is void.
Precision: Whole earthquakes of magnitude 5.0 or more, UTC month, event type earthquake.

## As first published, and the proof

Not on-chain yet. The newest complete period goes on-chain with the daily proof at 12:40 UTC.

## Last 30 complete periods

| Period | Level | Change | Band |
| --- | ---: | ---: | --- |
| Oct 2026 | 223 earthquakes | +36.0% | Quiet |
| Sep 2026 | 164 earthquakes | -13.7% | Quiet |
| Aug 2026 | 190 earthquakes | -16.7% | Quiet |
| Jul 2026 | 228 earthquakes | +26.7% | Quiet |
| Jun 2026 | 180 earthquakes | +52.5% | Quiet |
| May 2026 | 118 earthquakes | -30.2% | Quiet |
| Apr 2026 | 169 earthquakes | +6.3% | Quiet |
| Mar 2026 | 159 earthquakes | +40.7% | Quiet |
| Feb 2026 | 113 earthquakes | -36.9% | Quiet |
| Jan 2026 | 179 earthquakes | +13.3% | Quiet |
| Dec 2025 | 158 earthquakes | +3.3% | Quiet |
| Nov 2025 | 153 earthquakes | -14.0% | Quiet |
| Oct 2025 | 178 earthquakes | -8.7% | Quiet |
| Sep 2025 | 195 earthquakes | -11.0% | Quiet |
| Aug 2025 | 219 earthquakes | -47.0% | Quiet |
| Jul 2025 | 413 earthquakes | +250.0% | Rare |
| Jun 2025 | 118 earthquakes | -17.5% | Quiet |
| May 2025 | 143 earthquakes | -8.3% | Quiet |
| Apr 2025 | 156 earthquakes | +35.7% | Quiet |
| Mar 2025 | 115 earthquakes | -10.9% | Quiet |
| Feb 2025 | 129 earthquakes | -15.1% | Quiet |
| Jan 2025 | 152 earthquakes | 0.0% | Quiet |
| Dec 2024 | 152 earthquakes | +35.7% | Quiet |
| Nov 2024 | 112 earthquakes | -7.4% | Quiet |
| Oct 2024 | 121 earthquakes | -3.2% | Quiet |
| Sep 2024 | 125 earthquakes | +19.0% | Quiet |
| Aug 2024 | 105 earthquakes | -7.9% |  |
| Jul 2024 | 114 earthquakes | +4.6% |  |
| Jun 2024 | 109 earthquakes | -15.5% |  |
| May 2024 | 129 earthquakes | -28.7% |  |

JSON: https://tickerz.com/api/indices/bigquake

## Asked often

**How many magnitude 5 earthquakes happen each month?** The world had 223 earthquakes of magnitude 5 or more in Oct 2026, as the US Geological Survey's catalogue counts them.

**Where does the $BIGQUAKE number come from?** Tickerz reads it from US Geological Survey, ComCat earthquake catalogue, FDSN event count service. Monthly. The Survey posts a large quake within minutes and reviews it within days; a month prints seven days after it ends. Each number is kept as it was first published, with a timestamped proof, and any later revision is shown beside it.

**Can I download the $BIGQUAKE data?** Yes, free and with no key: the full history as JSON at https://tickerz.com/api/indices/bigquake and every period as CSV at https://tickerz.com/api/indices/bigquake/history.csv.

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