QUENAST (BE)
Known mine explosion28 March 2013
- Magnitude
- 1.5ML
- Depth
- –
- Belgian time
- 15:10:372013-03-28
- UTC
- 14:10:372013-03-28
Main parameters
| Date and time | 2013-03-28 14:10:37 UTC 2013-03-28 15:10:37 Belgian time |
|---|---|
| Magnitude | ML 1.5 |
| Epicentral coordinates | 50.677° N, 4.166° E Uncertainty ± 4.0 km |
| Event ID | ROB 4839 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2013-03-29 08:21:01 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
- 6.8 – 125.1km
- Mean velocity, P wave
- 5.7km/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. Depth not determined: hypocenter placed at the surface for the calculation. P wave: 5 measurements, root-mean-square deviation 0.11 s.
Stations farther than 120 km are left out of the fit: the first waves to reach them have travelled beneath the crust, through the mantle, where they propagate faster.
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 | |||||
| SKQSteenkerque | 6.8 | 243 | 14:10:37.97+0.97 s | 14:10:38.71+1.71 s | 0.74 |
| RQRRonquières | 8.9 | 152 | 14:10:38.19+1.19 s | 14:10:39.33+2.33 s | 1.14 |
| SNFSeneffe | 20.3 | 156 | 14:10:40.32+3.32 s | – | – |
| GESGesves | 72.9 | 116 | 14:10:49.73+12.73 s | – | – |
| CLAClavier | 85.5 | 109 | 14:10:51.64+14.64 s | – | – |
| Dutch seismic network (KNMI)1 station | |||||
| HGNHeimansgroeve | 125.1 | 85 | 14:10:58.37+21.37 s | – | – |