BELGIAN COAST (BE)
Suspected mine explosion20 May 2015
- Magnitude
- 0.8ML
- Depth
- 9.4km ± 3.3
- Belgian time
- 17:43:172015-05-20
- UTC
- 15:43:172015-05-20
Main parameters
| Date and time | 2015-05-20 15:43:17 UTC 2015-05-20 17:43:17 Belgian time |
|---|---|
| Magnitude | ML 0.8 |
| Epicentral coordinates | 51.337° N, 3.313° E Uncertainty ± 4.3 km |
| Depth of hypocenter | 9.4 ± 3.3 km |
| Event ID | ROB 5328 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2015-05-21 08:20:39 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
- 28.3 – 173.3km
- Mean velocity, P wave
- 6.3km/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 9.4 km. P wave: 4 measurements, root-mean-square deviation 0.16 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 | 28.3 | 247 | 15:43:23.44+5.65 s | 15:43:25.97+8.18 s | 2.53 | 4.9 |
| LESLessines | 79.0 | 152 | 15:43:31.45+13.66 s | 15:43:39.94+22.15 s | 8.49 | – |
| SKQSteenkerque | 93.6 | 145 | 15:43:33.37+15.58 s | 15:43:45.83+28.04 s | 12.46 | – |
| SNFSeneffe | 114.5 | 143 | 15:43:37.05+19.26 s | – | – | – |
| MRDMaredsous | 154.2 | 138 | 15:43:42.42+24.63 s | 15:44:00.49+42.70 s | 18.07 | – |
| GESGesves | 163.8 | 130 | 15:43:43.87+26.08 s | 15:43:59.68+41.89 s | 15.81 | – |
| DOUDourbes | 165.2 | 146 | 15:43:44.01+26.22 s | 15:44:03.89+46.10 s | 19.88 | – |
| CLAClavier | 173.3 | 125 | 15:43:45.31+27.52 s | 15:44:05.67+47.88 s | 20.36 | 1.4 |