BAD (DE)
Earthquake9 September 2004
- Magnitude
- 2.1ML
- Depth
- 9.0km ± 1.4
- Belgian time
- 04:27:362004-09-09
- UTC
- 02:27:362004-09-09
Main parameters
| Date and time | 2004-09-09 02:27:36 UTC 2004-09-09 04:27:36 Belgian time |
|---|---|
| Magnitude | ML 2.1 |
| Epicentral coordinates | 50.674° N, 7.257° E Uncertainty ± 2.0 km |
| Depth of hypocenter | 9.0 ± 1.4 km |
| Event ID | ROB 2019 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2009-05-30 18:17:43 Belgian time
Location map
- Epicentre
- Station that recorded the event
Seismic activity in the area
Known earthquakes around the epicentre, from the catalogue of the Royal Observatory of Belgium.
Within 10 km of the epicentre
24 other earthquakes in the catalogue since 1842. 16 of them occurred after this one. This is, jointly, the largest known earthquake in the area.
Latest earthquakes before this one
| Date | Place | Magnitude | Intensity | Distance km |
|---|---|---|---|---|
| 2004-09-09 | BAD (DE) | ML 1.6 | – | 1.4 |
| 2002-05-12 | BERKUM (DE) | ML 1.3 | – | 10.0 |
| 2001-08-22 | ERPEL (DE) | ML 1.3 | – | 9.0 |
| 2000-11-20 | BAD (DE) | ML 1.6 | – | 7.8 |
| 1990-11-09 | BAD GODESBERG (DE) | ML 1.9 | – | 9.2 |
Largest known earthquakes
| Date | Place | Magnitude | Intensity | Distance km |
|---|---|---|---|---|
| 2004-09-09 | This earthquake | ML 2.1 | – | – |
| 2021-08-23 | KRETZHAUS (DE) | ML 2.1 | – | 6.7 |
| 1990-11-09 | BAD GODESBERG (DE) | ML 1.9 | – | 9.2 |
| 2004-09-09 | UNKEL (DE) | ML 1.9 | – | 9.2 |
| 1988-12-11 | BAD (DE) | ML 1.7 | – | 6.2 |
Notes and method
Tectonic and induced earthquakes from the Observatory’s catalogue, suspected ones included; quarry blasts, explosions and other events are not counted. Epicentral distances on the WGS84 ellipsoid.
Municipality: 2025 municipal boundaries (Statbel), applied to every earthquake, including those before the merger of municipalities. For an epicentre outside Belgium, only the circular area is given. Each earthquake’s name is the catalogue’s: it may refer to a place near the epicentre.
Magnitude: the one given on each earthquake’s page (ML preferably, otherwise MW or MS); magnitudes of different types are compared as they are.
The epicentres of historical earthquakes are only known to within a few kilometres, sometimes more: whether they fall in the area is indicative. Small earthquakes have only been recorded as the station network grew: the area’s older earthquakes are mostly the largest ones, and recent activity looks more frequent.
Arrival times at the stations
Each station first records the P wave, the fastest, then the S wave. The farther a station is from the epicentre, the later the waves reach it and the wider the gap between the two.
- Stations
- 5
- Epicentral distance
- 88.5 – 157.2km
- P wave
- S wave
Station measurements
P- and S-wave arrivals and ground displacement measured at each station. Click a column heading to change the order.
| km | ° | UTC | UTC | s | nm | |
|---|---|---|---|---|---|---|
| Belgian seismic network (Royal Observatory of Belgium)5 stations | ||||||
| MEMBMembach | 88.5 | 266 | 02:27:51.14+14.80 s | 02:28:01.86+25.52 s | 10.72 | 28.1 |
| KLBKalborn | 103.6 | 232 | 02:27:53.58+17.24 s | 02:28:06.32+29.98 s | 12.74 | 52.0 |
| STISart Tilman | 120.2 | 266 | 02:27:56.60+20.26 s | – | – | – |
| RCHRochefort | 155.4 | 249 | 02:28:01.76+25.42 s | 02:28:19.68+43.34 s | 17.92 | 21.1 |
| GESGesves | 157.2 | 259 | 02:28:01.89+25.55 s | 02:28:20.51+44.17 s | 18.62 | – |