FERNELMONT (BE)
Quarry blast21 March 2018
- Magnitude
- 2.1ML
- Depth
- –
- Belgian time
- 14:16:592018-03-21
- UTC
- 13:16:592018-03-21
Main parameters
| Date and time | 2018-03-21 13:16:59 UTC 2018-03-21 14:16:59 Belgian time |
|---|---|
| Magnitude | ML 2.1 |
| Epicentral coordinates | 50.519° N, 4.942° E Uncertainty ± 1.5 km |
| Event ID | ROB 6425 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2018-03-29 10:59:57 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
- 18.1 – 80.4km
- Mean velocity, P wave
- 5.6km/s
- Mean velocity, S wave
- 3.2km/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: 7 measurements, root-mean-square deviation 0.36 s. S wave: 4 measurements, root-mean-square deviation 0.45 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 | |
|---|---|---|---|---|---|
| Belgian seismic network (Royal Observatory of Belgium)7 stations | |||||
| GESGesves | 18.1 | 145 | 13:17:02.71+2.82 s | 13:17:04.66+4.77 s | 1.95 |
| MRDMaredsous | 27.1 | 207 | 13:17:05.33+5.44 s | 13:17:08.25+8.36 s | 2.92 |
| CLAClavier | 27.9 | 113 | 13:17:05.07+5.18 s | 13:17:07.85+7.96 s | 2.78 |
| DOUDourbes | 53.2 | 208 | 13:17:09.13+9.24 s | 13:17:16.52+16.63 s | 7.39 |
| SKQSteenkerque | 62.8 | 284 | 13:17:10.62+10.73 s | – | – |
| MEMSMembach | 76.3 | 82 | 13:17:13.20+13.31 s | – | – |
| MRGMont Rigi | 80.4 | 90 | 13:17:13.92+14.03 s | – | – |