ROCHEFORT (BE)
Quarry blast10 March 2021
- Magnitude
- 1.5ML
- Depth
- –
- Belgian time
- 11:41:182021-03-10
- UTC
- 10:41:182021-03-10
Main parameters
| Date and time | 2021-03-10 10:41:18 UTC 2021-03-10 11:41:18 Belgian time |
|---|---|
| Magnitude | ML 1.5 |
| Epicentral coordinates | 50.163° N, 5.253° E Uncertainty ± 1.4 km |
| Event ID | ROB 12740 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2021-03-10 12:14:34 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
- 2.1 – 73.2km
- Mean velocity, P wave
- 5.8km/s
- Mean velocity, S wave
- 3.7km/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 0.51 s. S wave: 8 measurements, root-mean-square deviation 0.95 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)8 stations | |||||
| RCHRochefort | 2.1 | 243 | 10:41:18.45+0.31 s | 10:41:18.71+0.57 s | 0.26 |
| GESGesves | 27.3 | 334 | 10:41:23.13+4.99 s | 10:41:26.71+8.57 s | 3.58 |
| CLAClavier | 28.7 | 7 | 10:41:23.13+4.99 s | 10:41:27.02+8.88 s | 3.89 |
| MRDMaredsous | 37.9 | 294 | 10:41:24.78+6.64 s | 10:41:29.79+11.65 s | 5.01 |
| DOUDourbes | 47.6 | 261 | 10:41:26.42+8.28 s | 10:41:32.74+14.60 s | 6.32 |
| KLBKalborn | 61.6 | 96 | 10:41:28.61+10.47 s | 10:41:36.51+18.37 s | 7.90 |
| MEMSMembach | 73.2 | 47 | 10:41:31.92+13.78 s | 10:41:37.36+19.22 s | 5.44 |
| MEMHMembach | 73.2 | 47 | 10:41:31.94+13.80 s | 10:41:37.38+19.24 s | 5.44 |