This event was reviewed by an analyst and confirmed.
| Type | Earthquake |
| Magnitude | 2.3 MLv |
| Local datetime | 1981/04/16 23:52 |
| Universal datetime | 1981/04/16 21:52 |
| Latitude | 47.15 ° ± 3 km |
| Longitude | -1.90 ° ± 12 km |
| Depth | 5 km (operator assigned) ± 0.0 km |
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Testify !Near cities
This table shows only the most populated cities around the epicenter.
| Name | Distance (km) | Population |
|---|---|---|
Saint-Herblain 
|
22 | 46268 |
| Couëron
|
16 | 21372 |
| Bouguenais
|
22 | 19331 |
| Pornic
|
12 | 15018 |
| Saint-Brevin-les-Pins
|
22 | 13802 |
| Saint-Philbert-de-Grand-Lieu
|
21 | 8921 |
| Sautron
|
22 | 8192 |
| Bouaye
|
17 | 7844 |
| Machecoul-Saint-Même
|
18 | 7473 |
| Saint-Étienne-de-Montluc
|
16 | 7129 |
| Sainte-Pazanne
|
10 | 6774 |
| Chaumes-en-Retz
|
2 | 6759 |
| La Montagne
|
17 | 6231 |
| Saint-Jean-de-Boiseau
|
15 | 5827 |
| Le Pellerin
|
10 | 5100 |
Past seismicity
This map shows only the 50 most significant earthquakes around this event.
Event details
Parameters
| Evaluation status | final |
|---|---|
| RMS | 0.9 |
| Azimuthal gap | |
| Number of stations used | 4 |
| Number of phases used | 6 |
Webservices
The data of this event are available in various formats (QuakeML, GeoJSON and text) through the following links :
Phases
| Network | Station | Phase | Time | Residual (s) | Azimuth (°) | Distance (°) | Mode |
|---|---|---|---|---|---|---|---|
| RD | LPF | Pg | 21:52:59.90 | 0.64 | 33 | 1.05 | Manual |
| RD | LPF | Sg | 21:53:15.0 | 1.03 | 33 | 1.05 | Manual |
| RD | MFF | Sg | 21:53:22.70 | -0.08 | 114 | 1.33 | Manual |
| RD | GRR | Pg | 21:53:05.70 | -0.45 | 29 | 1.42 | Manual |
| RD | GRR | Sg | 21:53:25.40 | -0.54 | 29 | 1.42 | Manual |
| RD | FLN | Sg | 21:53:40.9 | -0.53 | 30 | 1.87 | Manual |