DEUX-ACREN (BE)
Known mine explosion26 September 2017
- Magnitude
- 1.6ML
- Depth
- –
- Belgian time
- 13:45:292017-09-26
- UTC
- 11:45:292017-09-26
Main parameters
| Date and time | 2017-09-26 11:45:29 UTC 2017-09-26 13:45:29 Belgian time |
|---|---|
| Magnitude | ML 1.6 |
| Epicentral coordinates | 50.742° N, 3.839° E Uncertainty ± 5.0 km |
| Event ID | ROB 5910 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2017-10-03 15:05:13 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
- 10
- Epicentral distance
- 3.5 – 159.5km
- Mean velocity, P wave
- 5.6km/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: 8 measurements, root-mean-square deviation 0.37 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)10 stations | ||||||
| LESLessines | 3.5 | 175 | 11:45:29.81+0.49 s | 11:45:29.91+0.59 s | 0.10 | – |
| SKQSteenkerque | 20.0 | 121 | 11:45:32.62+3.30 s | – | – | – |
| RQRRonquières | 31.2 | 119 | 11:45:34.54+5.22 s | – | – | – |
| BRQBracquegnies | 35.9 | 144 | 11:45:35.60+6.28 s | – | – | – |
| BOUBougnies | 40.0 | 169 | 11:45:36.93+7.61 s | – | – | – |
| GESGesves | 97.0 | 114 | 11:45:46.25+16.93 s | – | – | – |
| CLAClavier | 109.7 | 109 | 11:45:48.12+18.80 s | – | – | – |
| RCHRochefort | 118.3 | 123 | 11:45:50.76+21.44 s | 11:46:05.04+35.72 s | 14.28 | – |
| MEMSMembach | 154.2 | 95 | 11:45:55.28+25.96 s | 11:46:13.26+43.94 s | 17.98 | 6.6 |
| HOUHouvegnez | 159.5 | 105 | 11:45:56.31+26.99 s | – | – | – |