LA ROCHE-EN-ARDENNE (BE)
Quarry blast26 May 2021
- Magnitude
- 1.6ML
- Depth
- –
- Belgian time
- 15:03:532021-05-26
- UTC
- 13:03:532021-05-26
Main parameters
| Date and time | 2021-05-26 13:03:53 UTC 2021-05-26 15:03:53 Belgian time |
|---|---|
| Magnitude | ML 1.6 |
| Epicentral coordinates | 50.198° N, 5.610° E Uncertainty ± 2.5 km |
| Event ID | ROB 13530 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2021-05-26 20:23:32 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
- 9
- Epicentral distance
- 33.0 – 73.5km
- Mean velocity, P wave
- 6.0km/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: 9 measurements, root-mean-square deviation 0.19 s. S wave: 9 measurements, root-mean-square deviation 0.35 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)9 stations | |||||
| CLAClavier | 33.0 | 318 | 13:03:59.11+5.36 s | 13:04:04.07+10.32 s | 4.96 |
| HOUHouvegnez | 33.1 | 58 | 13:03:59.34+5.59 s | 13:04:03.38+9.63 s | 4.04 |
| KLBKalborn | 37.3 | 107 | 13:04:00.18+6.43 s | 13:04:05.15+11.40 s | 4.97 |
| GESGesves | 42.7 | 299 | 13:04:00.95+7.20 s | 13:04:06.61+12.86 s | 5.66 |
| MRGMont Rigi | 48.1 | 43 | 13:04:01.89+8.14 s | 13:04:08.76+15.01 s | 6.87 |
| VIAVianden | 51.5 | 124 | 13:04:02.86+9.11 s | 13:04:09.16+15.41 s | 6.30 |
| MEMHMembach | 53.9 | 32 | 13:04:03.05+9.30 s | 13:04:09.98+16.23 s | 6.93 |
| MRDMaredsous | 61.2 | 281 | 13:04:04.19+10.44 s | 13:04:11.48+17.73 s | 7.29 |
| DOUDourbes | 73.5 | 261 | 13:04:05.96+12.21 s | 13:04:16.12+22.37 s | 10.16 |