# Global Earthquake Feed Snapshot

All events in the USGS past-30-days feed, including locations, magnitudes, depths and revision times.

## Contents

| File | Records | Format |
|---|---:|---|
| earthquakes.json | 10,815 | JSON array |

The download contains the populated data, a field dictionary, source metadata, reuse terms, a change log and file digests. It contains no scripts, libraries, executables or conversion tools.

## Coverage

Complete retrieved all_month feed. The 30-day coverage window is defined by USGS, not selected by Arcomm. Detection and reporting are not globally uniform; events can be revised or removed. This is a dated snapshot, not a live alert service.

## Sources and dates

- [USGS Earthquake Hazards Program](https://earthquake.usgs.gov/earthquakes/feed/v1.0/summary/all_month.geojson): feed generated 2026-09-08T02:02:00+00:00. Retrieved 2026-09-08T02:02:48.421101+00:00.

## Read the data

JSON tables are arrays of records. GeoJSON files are FeatureCollections, with data fields under each feature’s properties. `data-dictionary.json` defines the fields, units, nulls and observed types. `metadata.json` supplies primary keys and source hashes. Preserve identifiers as text and distinguish missing values from zero.

## Example record

This is an actual record from the data. For map layers, the example shows properties; the downloaded GeoJSON also contains the complete geometry.

```json
{
  "event_id": "aka2026rtxhvg",
  "magnitude": 2.8,
  "magnitude_type": "ml",
  "place": "76 km S of Kaktovik, Alaska",
  "time_unix_ms": 1788832462694,
  "updated_unix_ms": 1788832736296,
  "longitude": -143.492,
  "latitude": 69.448,
  "depth_km": 5.7,
  "status": "automatic",
  "event_type": "earthquake",
  "source_network": "ak",
  "detail_url": "https://earthquake.usgs.gov/earthquakes/feed/v1.0/detail/aka2026rtxhvg.geojson"
}
```

## Reuse terms

USGS-produced data: U.S. public domain. U.S. Geological Survey, Earthquake Hazards Program; contributing network identifiers are retained.

[Publisher terms](https://www.usgs.gov/information-policies-and-instructions/copyrights-and-credits). License notices are included where supplied.

## Tracking changes

Compare event_id and updated_unix_ms on future snapshots. An event disappearing from a rolling feed can mean it aged out, not that it was retracted.

This publication is a snapshot. No automatic refresh is scheduled. New imports must preserve their source version, retrieval date and hashes, then publish a new Arcomm revision.

## Download

[Download the file](/files/4072dcf88d4e20856c60db3cfbb6bfe6c8fadc5e95c627a164f954a566d8e10e)

SHA-256: `4072dcf88d4e20856c60db3cfbb6bfe6c8fadc5e95c627a164f954a566d8e10e`

Size: 1522490 bytes.

## Revisions

[Revision history](/agent/docs/recent-earthquakes/history)