NAMUR (BE)
Known mine explosion15 July 2011
- Magnitude
- 1.6ML
- Depth
- –
- Belgian time
- 11:56:212011-07-15
- UTC
- 09:56:212011-07-15
Main parameters
| Date and time | 2011-07-15 09:56:21 UTC 2011-07-15 11:56:21 Belgian time |
|---|---|
| Magnitude | ML 1.6 |
| Epicentral coordinates | 50.508° N, 4.951° E Uncertainty ± 3.8 km |
| Event ID | ROB 4558 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2011-08-03 08:30:20 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
- 9
- Epicentral distance
- 16.7 – 75.9km
- Mean velocity, P wave
- 5.9km/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: 9 measurements, root-mean-square deviation 0.25 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)9 stations | |||||
| GESGesves | 16.7 | 145 | 09:56:24.21+2.76 s | 09:56:25.53+4.08 s | 1.32 |
| MRDMaredsous | 26.3 | 210 | 09:56:26.66+5.21 s | – | – |
| CLAClavier | 26.8 | 111 | 09:56:26.15+4.70 s | 09:56:29.23+7.78 s | 3.08 |
| STISart Tilman | 44.3 | 79 | 09:56:29.03+7.58 s | – | – |
| LCHLa Chartreuse | 48.2 | 72 | 09:56:29.92+8.47 s | – | – |
| DOUDourbes | 52.4 | 209 | 09:56:30.17+8.72 s | – | – |
| RQRRonquières | 52.6 | 282 | 09:56:30.69+9.24 s | – | – |
| MEMHMembach | 75.9 | 81 | 09:56:34.42+12.97 s | – | – |
| MEMSMembach | 75.9 | 81 | 09:56:34.57+13.12 s | – | – |
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