HEYD (BE)
Known mine explosion9 September 2015
- Magnitude
- 1.9ML
- Depth
- –
- Belgian time
- 14:02:242015-09-09
- UTC
- 12:02:242015-09-09
Main parameters
| Date and time | 2015-09-09 12:02:24 UTC 2015-09-09 14:02:24 Belgian time |
|---|---|
| Magnitude | ML 1.9 |
| Epicentral coordinates | 50.354° N, 5.568° E Uncertainty ± 3.3 km |
| Event ID | ROB 5404 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2015-09-09 14:51:17 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
- 8
- Epicentral distance
- 20.2 – 75.2km
- Mean velocity, P wave
- 5.6km/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. Depth not determined: hypocenter placed at the surface for the calculation. P wave: 8 measurements, root-mean-square deviation 0.29 s. S wave: 5 measurements, root-mean-square deviation 0.35 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)7 stations | |||||
| CLAClavier | 20.2 | 291 | 12:02:27.10+2.67 s | 12:02:30.62+6.19 s | 3.52 |
| HOUHouvegnez | 31.1 | 90 | 12:02:29.71+5.28 s | 12:02:33.48+9.05 s | 3.77 |
| RCHRochefort | 32.9 | 228 | 12:02:29.81+5.38 s | 12:02:33.81+9.38 s | 4.00 |
| GESGesves | 34.4 | 276 | 12:02:30.11+5.68 s | – | – |
| MEMHMembach | 42.3 | 48 | 12:02:31.62+7.19 s | 12:02:36.09+11.66 s | 4.47 |
| MEMSMembach | 42.3 | 48 | 12:02:31.68+7.25 s | – | – |
| DOUDourbes | 75.2 | 248 | 12:02:37.49+13.06 s | 12:02:46.10+21.67 s | 8.61 |
| Dutch seismic network (KNMI)1 station | |||||
| HGNHeimansgroeve | 52.4 | 29 | 12:02:33.96+9.53 s | – | – |