WAIMES (BE)
Quarry blast22 March 2021
- Magnitude
- 1.3ML
- Depth
- –
- Belgian time
- 13:40:192021-03-22
- UTC
- 12:40:192021-03-22
Main parameters
| Date and time | 2021-03-22 12:40:19 UTC 2021-03-22 13:40:19 Belgian time |
|---|---|
| Magnitude | ML 1.3 |
| Epicentral coordinates | 50.425° N, 6.105° E Uncertainty ± 3.8 km |
| Event ID | ROB 12830 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2021-03-22 19:47:15 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
- 10
- Epicentral distance
- 9.8 – 72.5km
- Mean velocity, P wave
- 5.7km/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: 10 measurements, root-mean-square deviation 0.20 s. S wave: 4 measurements, root-mean-square deviation 0.26 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 | |||||
| MRGMont Rigi | 9.8 | 347 | 12:40:21.32+1.76 s | 12:40:22.90+3.34 s | 1.58 |
| HOUHouvegnez | 10.6 | 222 | 12:40:21.28+1.72 s | 12:40:22.90+3.34 s | 1.62 |
| MEMSMembach | 21.6 | 342 | 12:40:23.36+3.80 s | – | – |
| MEMHMembach | 21.6 | 342 | 12:40:23.36+3.80 s | 12:40:26.60+7.04 s | 3.24 |
| KLBKalborn | 36.1 | 180 | 12:40:25.94+6.38 s | – | – |
| VIAVianden | 54.9 | 173 | 12:40:29.07+9.51 s | – | – |
| CLAClavier | 57.1 | 270 | 12:40:29.49+9.93 s | – | – |
| RCHRochefort | 69.4 | 245 | 12:40:32.23+12.67 s | – | – |
| GESGesves | 72.5 | 267 | 12:40:32.07+12.51 s | – | – |
| Dutch seismic network (KNMI)1 station | |||||
| HGNHeimansgroeve | 39.7 | 342 | 12:40:26.60+7.04 s | 12:40:31.46+11.90 s | 4.86 |