PETIT-ENGHIEN (BE)
Known mine explosion21 October 2008
- Magnitude
- 1.5ML
- Depth
- 1.5km ± 4.5
- Belgian time
- 17:20:282008-10-21
- UTC
- 15:20:282008-10-21
Main parameters
| Date and time | 2008-10-21 15:20:28 UTC 2008-10-21 17:20:28 Belgian time |
|---|---|
| Magnitude | ML 1.5 |
| Epicentral coordinates | 50.698° N, 4.106° E Uncertainty ± 1.1 km |
| Depth of hypocenter | 1.5 ± 4.5 km |
| Event ID | ROB 3809 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2012-04-27 16:33:58 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
- 7
- Epicentral distance
- 5.8 – 75.6km
- Mean velocity, P wave
- 6.7km/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. Hypocenter at a depth of 1.5 km. P wave: 7 measurements, root-mean-square deviation 0.27 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)7 stations | ||||||
| SKQSteenkerque | 5.8 | 199 | 15:20:30.02+1.03 s | – | – | – |
| RQRRonquières | 13.3 | 141 | 15:20:31.45+2.46 s | – | – | – |
| LESLessines | 18.6 | 274 | 15:20:32.40+3.41 s | – | – | – |
| SNFSeneffe | 24.3 | 149 | 15:20:33.38+4.39 s | 15:20:36.42+7.43 s | 3.04 | 32.3 |
| OTTOttignies | 32.4 | 98 | 15:20:34.71+5.72 s | – | – | – |
| OT1OT1-Mellery | 34.9 | 109 | 15:20:35.05+6.06 s | – | – | – |
| DOUDourbes | 75.6 | 152 | 15:20:40.55+11.56 s | – | – | – |
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