ESQUELMES (BE)
Known mine explosion25 June 2008
- Magnitude
- 1.8ML
- Depth
- 1.0km ± 8.4
- Belgian time
- 12:41:362008-06-25
- UTC
- 10:41:362008-06-25
Main parameters
| Date and time | 2008-06-25 10:41:36 UTC 2008-06-25 12:41:36 Belgian time |
|---|---|
| Magnitude | ML 1.8 |
| Epicentral coordinates | 50.661° N, 3.339° E Uncertainty ± 4.9 km |
| Depth of hypocenter | 1.0 ± 8.4 km |
| Event ID | ROB 3152 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2010-02-05 09:34:24 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
- 52.4 – 127.7km
- Mean velocity, P wave
- 6.9km/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. Hypocenter at a depth of 1.0 km. P wave: 5 measurements, root-mean-square deviation 0.12 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 | nm | |
|---|---|---|---|---|---|---|
| Belgian seismic network (Royal Observatory of Belgium)6 stations | ||||||
| SKQSteenkerque | 52.4 | 91 | 10:41:45.65+9.04 s | 10:41:52.04+15.43 s | 6.39 | 58.0 |
| BOUBougnies | 52.6 | 125 | 10:41:46.05+9.44 s | – | – | – |
| RQRRonquières | 63.0 | 95 | 10:41:47.44+10.83 s | 10:41:54.93+18.32 s | 7.49 | 39.7 |
| SNFSeneffe | 69.0 | 104 | 10:41:48.27+11.66 s | – | – | – |
| DOUDourbes | 109.3 | 125 | 10:41:54.09+17.48 s | 10:42:08.23+31.62 s | 14.14 | 10.0 |
| GESGesves | 127.7 | 103 | 10:41:58.18+21.57 s | 10:42:14.10+37.49 s | 15.92 | 10.0 |