Magnitude
M5.6
Depth
17 km
Sweep radius
500 km
Status
reviewed
The record
Everything the slot carries, as measured. Series arrays are drawn above and listed here in full.
| start_utc | 1987-07-31T19:56:57.830000-04:00 |
|---|---|
| end_utc | 1987-07-31T19:56:57.830000-04:00 |
| lat | 40.416 |
| lon | -124.383 |
| n_obs | 0 |
| origin_utc | 1987-07-31T19:56:57.830000-04:00 |
| place | 20 km SSW of Ferndale, California |
| tsunami_flag | 0 |
| provenance | [{"source_slug":"usgs_earthquake","name":"USGS Earthquake","url":"https://earthquake.usgs.gov/fdsnws/event/1/query","retrieved_utc":"2026-07-01"}] |
| last_fix_utc | 1987-07-31T19:56:57.830000-04:00 |
| window_hours_before | 6 |
| window_hours_after | 48 |
| total_sensor_hits | 0 |