ROCHEFORT (BE)
Known mine explosion15 March 2012
- Magnitude
- 1.3ML
- Depth
- –
- Belgian time
- 12:06:132012-03-15
- UTC
- 11:06:132012-03-15
Main parameters
| Date and time | 2012-03-15 11:06:13 UTC 2012-03-15 12:06:13 Belgian time |
|---|---|
| Magnitude | ML 1.3 |
| Epicentral coordinates | 50.172° N, 5.274° E Uncertainty ± 5.4 km |
| Event ID | ROB 4685 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2012-03-15 13:25:22 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
- 5
- Epicentral distance
- 3.8 – 49.3km
- Mean velocity, P wave
- 6.1km/s
- Mean velocity, S wave
- 3.5km/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. Depth not determined: hypocenter placed at the surface for the calculation. P wave: 5 measurements, root-mean-square deviation 0.18 s. S wave: 4 measurements, root-mean-square deviation 0.08 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 | |
|---|---|---|---|---|---|
| Belgian seismic network (Royal Observatory of Belgium)5 stations | |||||
| RCHRochefort | 3.8 | 241 | 11:06:14.32+1.25 s | 11:06:15.13+2.06 s | 0.81 |
| GESGesves | 27.2 | 331 | 11:06:18.46+5.39 s | – | – |
| CLAClavier | 27.6 | 4 | 11:06:18.59+5.52 s | 11:06:21.86+8.79 s | 3.27 |
| MRDMaredsous | 38.9 | 292 | 11:06:20.03+6.96 s | 11:06:25.00+11.93 s | 4.97 |
| DOUDourbes | 49.3 | 260 | 11:06:22.07+9.00 s | 11:06:27.92+14.85 s | 5.85 |