FRANC-WARET (BE)
Known mine explosion18 October 2012
- Magnitude
- 2.2ML
- Depth
- –
- Belgian time
- 14:28:012012-10-18
- UTC
- 12:28:012012-10-18
Main parameters
| Date and time | 2012-10-18 12:28:01 UTC 2012-10-18 14:28:01 Belgian time |
|---|---|
| Magnitude | ML 2.2 |
| Epicentral coordinates | 50.529° N, 4.966° E Uncertainty ± 3.1 km |
| Event ID | ROB 4789 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2012-10-18 17:29:43 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
- 18.2 – 74.0km
- Mean velocity, P wave
- 7.2km/s
- Mean velocity, S wave
- 4.1km/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 0.79 s. S wave: 5 measurements, root-mean-square deviation 0.67 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)9 stations | ||||||
| GESGesves | 18.2 | 152 | 12:28:04.40+2.66 s | – | – | – |
| CLAClavier | 26.8 | 117 | 12:28:06.63+4.89 s | 12:28:10.04+8.30 s | 3.41 | 165.9 |
| SNFSeneffe | 48.4 | 268 | 12:28:09.59+7.85 s | – | – | – |
| RQRRonquières | 53.2 | 280 | 12:28:11.28+9.54 s | – | – | – |
| DOUDourbes | 55.0 | 209 | 12:28:11.83+10.09 s | 12:28:17.84+16.10 s | 6.01 | – |
| SKQSteenkerque | 64.1 | 282 | 12:28:13.02+11.28 s | – | – | – |
| MN8Mons - Université de Mons | 72.0 | 265 | 12:28:12.86+11.12 s | 12:28:20.83+19.09 s | 7.97 | – |
| MN9Mons - SWDE | 73.1 | 263 | 12:28:12.35+10.61 s | 12:28:20.57+18.83 s | 8.22 | – |
| MN7Mons - Maison de l'entreprise | 74.0 | 264 | 12:28:12.87+11.13 s | 12:28:20.66+18.92 s | 7.79 | – |