SART-BERNARD (BE)
Known mine explosion5 September 2012
- Magnitude
- 1.3ML
- Depth
- 1.0km ± 12.2
- Belgian time
- 12:50:482012-09-05
- UTC
- 10:50:482012-09-05
Main parameters
| Date and time | 2012-09-05 10:50:48 UTC 2012-09-05 12:50:48 Belgian time |
|---|---|
| Magnitude | ML 1.3 |
| Epicentral coordinates | 50.391° N, 4.940° E Uncertainty ± 13.0 km |
| Depth of hypocenter | 1.0 ± 12.2 km |
| Event ID | ROB 4771 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2012-09-06 07:43:52 Belgian time
Location map
- Epicentre
- Station that recorded the event
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
- 7
- Epicentral distance
- 10.5 – 71.5km
- Mean velocity, P wave
- 6.7km/s
- Mean velocity, S wave
- 3.7km/s
- P wave
- S wave
- Curve fitted to the measurements
Notes and method
Curves: travel time of a direct wave in a homogeneous medium. The velocity of each wave and an origin-time shift, common to both, are fitted to the measurements by least squares. Hypocenter at a depth of 1.0 km. P wave: 7 measurements, root-mean-square deviation 0.53 s. S wave: 5 measurements, root-mean-square deviation 0.71 s.
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)7 stations | ||||||
| GESGesves | 10.5 | 94 | 10:50:50.31+1.42 s | 10:50:52.98+4.09 s | 2.67 | – |
| MRDMaredsous | 15.8 | 231 | 10:50:52.11+3.22 s | – | – | – |
| CLAClavier | 25.9 | 83 | 10:50:52.84+3.95 s | 10:50:56.85+7.96 s | 4.01 | 20.4 |
| DOUDourbes | 41.1 | 217 | 10:50:56.09+7.20 s | – | – | – |
| MN9Mons - SWDE | 71.0 | 275 | 10:51:00.57+11.68 s | 10:51:09.92+21.03 s | 9.35 | – |
| MN4Mons - IDEA station de pompage | 71.1 | 277 | 10:51:00.57+11.68 s | 10:51:08.41+19.52 s | 7.84 | – |
| MN1Mons - Lotto Mons Expo | 71.5 | 276 | 10:50:59.54+10.65 s | 10:51:08.13+19.24 s | 8.59 | – |