BREDENE (BE)
Known mine explosion20 July 2015
- Magnitude
- 2.1ML
- Depth
- 5.0km
- Belgian time
- 21:27:462015-07-20
- UTC
- 19:27:462015-07-20
Main parameters
| Date and time | 2015-07-20 19:27:46 UTC 2015-07-20 21:27:46 Belgian time |
|---|---|
| Magnitude | ML 2.1 |
| Epicentral coordinates | 51.249° N, 2.962° E Uncertainty ± 7.5 km |
| Depth of hypocenter | 5.0 km |
| Event ID | ROB 5385 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2015-07-23 13:55:18 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
- 8
- Epicentral distance
- 2.0 – 148.4km
- 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. Hypocenter at a depth of 5.0 km. P wave: 6 measurements, root-mean-square deviation 0.30 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)8 stations | ||||||
| OSTBOostende | 2.0 | 232 | 19:27:46.82+0.41 s | – | – | – |
| LESLessines | 86.1 | 134 | 19:28:00.38+13.97 s | 19:28:10.26+23.85 s | 9.88 | 8.3 |
| SKQSteenkerque | 103.1 | 130 | 19:28:02.86+16.45 s | 19:28:16.49+30.08 s | 13.63 | – |
| RQRRonquières | 114.0 | 128 | 19:28:04.68+18.27 s | – | – | – |
| BOUBougnies | 118.1 | 144 | 19:28:06.14+19.73 s | – | – | – |
| BRQBracquegnies | 118.9 | 135 | 19:28:06.18+19.77 s | – | – | – |
| CSECourt-Saint-Etienne | 134.2 | 122 | 19:28:07.97+21.56 s | – | – | – |
| MOLTMol | 148.4 | 91 | 19:28:09.47+23.06 s | – | – | – |