ROCHEFORT (BE)
Quarry blast16 March 2020
- Magnitude
- 1.5ML
- Depth
- –
- Belgian time
- 12:01:052020-03-16
- UTC
- 11:01:052020-03-16
Main parameters
| Date and time | 2020-03-16 11:01:05 UTC 2020-03-16 12:01:05 Belgian time |
|---|---|
| Magnitude | ML 1.5 |
| Epicentral coordinates | 50.181° N, 5.250° E Uncertainty ± 0.3 km |
| Event ID | ROB 9495 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2020-03-16 15:26:37 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
- 12
- Epicentral distance
- 3.3 – 80.9km
- Mean velocity, P wave
- 5.9km/s
- Mean velocity, S wave
- 3.3km/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. Depth not determined: hypocenter placed at the surface for the calculation. P wave: 12 measurements, root-mean-square deviation 0.19 s. S wave: 6 measurements, root-mean-square deviation 0.17 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)11 stations | |||||
| RCHRochefort | 3.3 | 209 | 11:01:06.01+0.64 s | 11:01:06.45+1.08 s | 0.44 |
| GESGesves | 25.5 | 333 | 11:01:10.10+4.73 s | 11:01:13.49+8.12 s | 3.39 |
| CLAClavier | 26.7 | 8 | 11:01:10.18+4.81 s | 11:01:13.91+8.54 s | 3.73 |
| MRDMaredsous | 36.9 | 292 | 11:01:11.87+6.50 s | 11:01:16.81+11.44 s | 4.94 |
| DOUDourbes | 47.8 | 259 | 11:01:13.76+8.39 s | 11:01:19.99+14.62 s | 6.23 |
| HOUHouvegnez | 57.2 | 70 | 11:01:15.21+9.84 s | – | – |
| KLBKalborn | 62.1 | 98 | 11:01:16.13+10.76 s | 11:01:24.14+18.77 s | 8.01 |
| MRGMont Rigi | 69.3 | 58 | 11:01:17.19+11.82 s | – | – |
| MEMHMembach | 72.0 | 48 | 11:01:17.63+12.26 s | – | – |
| MEMSMembach | 72.0 | 48 | 11:01:17.66+12.29 s | – | – |
| VIAVianden | 73.5 | 112 | 11:01:18.27+12.90 s | – | – |
| Dutch seismic network (KNMI)1 station | |||||
| HGNHeimansgroeve | 80.9 | 36 | 11:01:19.81+14.44 s | – | – |