LA ROCHE-EN-ARDENNE (BE)
Quarry blast26 March 2021
- Magnitude
- 1.5ML
- Depth
- –
- Belgian time
- 14:16:522021-03-26
- UTC
- 13:16:522021-03-26
Main parameters
| Date and time | 2021-03-26 13:16:52 UTC 2021-03-26 14:16:52 Belgian time |
|---|---|
| Magnitude | ML 1.5 |
| Epicentral coordinates | 50.185° N, 5.585° E Uncertainty ± 0.7 km |
| Event ID | ROB 12855 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2021-03-26 18:52:07 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
- 25.8 – 56.0km
- Mean velocity, P wave
- 6.0km/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: 8 measurements, root-mean-square deviation 0.24 s. S wave: 7 measurements, root-mean-square deviation 0.24 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 | 25.8 | 263 | 13:16:57.13+4.81 s | 13:17:00.21+7.89 s | 3.08 |
| CLAClavier | 33.0 | 322 | 13:16:58.23+5.91 s | 13:17:03.03+10.71 s | 4.80 |
| HOUHouvegnez | 35.4 | 58 | 13:16:58.40+6.08 s | – | – |
| KLBKalborn | 38.6 | 104 | 13:16:59.34+7.02 s | 13:17:04.06+11.74 s | 4.72 |
| GESGesves | 41.9 | 302 | 13:16:59.95+7.63 s | 13:17:05.22+12.90 s | 5.27 |
| MRGMont Rigi | 50.3 | 44 | 13:17:00.86+8.54 s | 13:17:07.53+15.21 s | 6.67 |
| VIAVianden | 52.2 | 122 | 13:17:01.95+9.63 s | 13:17:08.20+15.88 s | 6.25 |
| MEMHMembach | 56.0 | 32 | 13:17:02.24+9.92 s | 13:17:09.00+16.68 s | 6.76 |