WAIMES (BE)
Quarry blast16 April 2021
- Magnitude
- 1.2ML
- Depth
- –
- Belgian time
- 13:08:042021-04-16
- UTC
- 11:08:042021-04-16
Main parameters
| Date and time | 2021-04-16 11:08:04 UTC 2021-04-16 13:08:04 Belgian time |
|---|---|
| Magnitude | ML 1.2 |
| Epicentral coordinates | 50.432° N, 6.120° E Uncertainty ± 1.0 km |
| Event ID | ROB 13165 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2021-04-16 13:28:34 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
- 9.3 – 115.0km
- Mean velocity, P wave
- 5.8km/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 0.23 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)7 stations | |||||
| MRGMont Rigi | 9.3 | 340 | 11:08:06.04+1.97 s | – | – |
| HOUHouvegnez | 11.9 | 223 | 11:08:06.06+1.99 s | 11:08:07.33+3.26 s | 1.27 |
| MEMHMembach | 21.2 | 338 | 11:08:07.65+3.58 s | 11:08:10.89+6.82 s | 3.24 |
| KLBKalborn | 37.0 | 181 | 11:08:10.74+6.67 s | – | – |
| VIAVianden | 55.6 | 174 | 11:08:13.88+9.81 s | – | – |
| CLAClavier | 58.2 | 269 | 11:08:14.05+9.98 s | – | – |
| DOUDourbes | 115.0 | 252 | 11:08:23.97+19.90 s | – | – |
| Dutch seismic network (KNMI)1 station | |||||
| HGNHeimansgroeve | 39.2 | 340 | 11:08:11.44+7.37 s | 11:08:15.90+11.83 s | 4.46 |
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