MARCHE-EN-FAMENNE (BE)
Quarry blast13 March 2020
- Magnitude
- 1.5ML
- Depth
- –
- Belgian time
- 12:58:232020-03-13
- UTC
- 11:58:232020-03-13
Main parameters
| Date and time | 2020-03-13 11:58:23 UTC 2020-03-13 12:58:23 Belgian time |
|---|---|
| Magnitude | ML 1.5 |
| Epicentral coordinates | 50.187° N, 5.246° E Uncertainty ± 0.7 km |
| Event ID | ROB 9475 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2020-03-13 13:08:14 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
- 11
- Epicentral distance
- 3.8 – 97.5km
- Mean velocity, P wave
- 5.9km/s
- Mean velocity, S wave
- 3.4km/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: 11 measurements, root-mean-square deviation 0.22 s. S wave: 7 measurements, root-mean-square deviation 0.29 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)10 stations | |||||
| RCHRochefort | 3.8 | 201 | 11:58:24.02+0.60 s | 11:58:24.77+1.35 s | 0.75 |
| GESGesves | 24.8 | 333 | 11:58:28.07+4.65 s | 11:58:31.12+7.70 s | 3.05 |
| CLAClavier | 26.1 | 9 | 11:58:28.26+4.84 s | 11:58:31.96+8.54 s | 3.70 |
| MRDMaredsous | 36.4 | 291 | 11:58:29.85+6.43 s | 11:58:34.31+10.89 s | 4.46 |
| DOUDourbes | 47.6 | 258 | 11:58:31.71+8.29 s | 11:58:38.12+14.70 s | 6.41 |
| KLBKalborn | 62.4 | 99 | 11:58:34.17+10.75 s | 11:58:42.02+18.60 s | 7.85 |
| MRGMont Rigi | 69.2 | 58 | 11:58:35.10+11.68 s | 11:58:43.76+20.34 s | 8.66 |
| MEMHMembach | 71.8 | 49 | 11:58:36.18+12.76 s | – | – |
| VIAVianden | 74.0 | 112 | 11:58:36.64+13.22 s | – | – |
| SKQSteenkerque | 97.5 | 302 | 11:58:40.41+16.99 s | – | – |
| Dutch seismic network (KNMI)1 station | |||||
| HGNHeimansgroeve | 80.6 | 37 | 11:58:37.51+14.09 s | – | – |