WELLIN
Known mine explosion21 May 2012
- Magnitude
- 1.3ML
- Depth
- 2.3km ± 3.5
- Belgian time
- 12:17:352012-05-21
- UTC
- 10:17:352012-05-21
Main parameters
| Date and time | 2012-05-21 10:17:35 UTC 2012-05-21 12:17:35 Belgian time |
|---|---|
| Magnitude | ML 1.3 |
| Epicentral coordinates | 50.062° N, 5.120° E Uncertainty ± 1.0 km |
| Depth of hypocenter | 2.3 ± 3.5 km |
| Event ID | ROB 4728 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2012-05-21 16:13:39 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
- 6
- Epicentral distance
- 12.9 – 86.3km
- Mean velocity, P wave
- 6.0km/s
- Mean velocity, S wave
- 3.4km/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 2.3 km. P wave: 4 measurements, root-mean-square deviation 0.09 s. S wave: 6 measurements, root-mean-square deviation 0.21 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)6 stations | ||||||
| RCHRochefort | 12.9 | 36 | 10:17:37.51+2.07 s | 10:17:39.26+3.82 s | 1.75 | 64.7 |
| GESGesves | 36.0 | 356 | 10:17:41.51+6.07 s | 10:17:45.98+10.54 s | 4.47 | – |
| MRDMaredsous | 36.7 | 317 | – | 10:17:46.73+11.29 s | – | – |
| DOUDourbes | 37.8 | 276 | 10:17:41.85+6.41 s | 10:17:46.74+11.30 s | 4.89 | 8.2 |
| CLAClavier | 41.8 | 18 | 10:17:42.55+7.11 s | 10:17:48.18+12.74 s | 5.63 | – |
| WLFWalferdange | 86.3 | 120 | – | 10:18:00.99+25.55 s | – | – |