This event was reviewed by an analyst and confirmed.
| Type | Earthquake |
| Magnitude | 3 MLv |
| Local datetime | 1984/12/20 12:21 |
| Universal datetime | 1984/12/20 11:21 |
| Latitude | 48.64 ° ± 3 km |
| Longitude | -2.17 ° ± 6 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-Malo 
|
14 | 46097 |
| Saint-Brieuc
|
46 | 44372 |
| Lamballe-Armor
|
32 | 16578 |
| Dinan
|
23 | 14166 |
| Plérin
|
46 | 14062 |
| Dinard
|
8 | 10027 |
| Trégueux
|
46 | 8432 |
| Langueux
|
43 | 7692 |
| Pleurtuit
|
10 | 6806 |
| Plédran
|
48 | 6666 |
| Le Mené
|
48 | 6417 |
| Combourg
|
41 | 5940 |
| Dol-de-Bretagne
|
34 | 5693 |
| Cancale
|
23 | 5121 |
| Yffiniac
|
42 | 5010 |
Past seismicity
This map shows only the 50 most significant earthquakes around this event.
Event details
Parameters
| Evaluation status | final |
|---|---|
| RMS | 0.7 |
| Azimuthal gap | |
| Number of stations used | 20 |
| Number of phases used | 9 |
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 | GRR | Pg | 11:21:49.10 | -0.25 | 105 | 0.91 | Manual |
| RD | GRR | Sg | 11:22:01.60 | -0.42 | 105 | 0.91 | Manual |
| RD | LPF | Pg | 11:21:50.20 | -0.28 | 128 | 0.97 | Manual |
| RD | LPF | Sg | 11:22:04.50 | 0.53 | 128 | 0.97 | Manual |
| RD | FLN | Pg | 11:21:53.20 | -0.23 | 83 | 1.12 | Manual |
| RD | FLN | Sg | 11:22:09.70 | 0.59 | 83 | 1.12 | Manual |
| RD | LDF | Pn | 11:21:57.10 | 0.53 | 91 | 1.36 | Manual |
| RD | LDF | Pg | 11:21:57.80 | -0.03 | 91 | 1.36 | Manual |
| RD | LDF | Sg | 11:22:16.40 | -0.34 | 91 | 1.36 | Manual |