WAIMES (BE)
Quarry blast5 May 2021
- Magnitude
- 0.9ML
- Depth
- –
- Belgian time
- 15:19:592021-05-05
- UTC
- 13:19:592021-05-05
Main parameters
| Date and time | 2021-05-05 13:19:59 UTC 2021-05-05 15:19:59 Belgian time |
|---|---|
| Magnitude | ML 0.9 |
| Epicentral coordinates | 50.427° N, 6.080° E Uncertainty ± 0.9 km |
| Event ID | ROB 13315 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2021-05-06 07:58:12 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
- 7
- Epicentral distance
- 9.4 – 55.4km
- Mean velocity, P wave
- 5.8km/s
- Mean velocity, S wave
- 3.2km/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: 7 measurements, root-mean-square deviation 0.11 s. S wave: 4 measurements, root-mean-square deviation 0.27 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)6 stations | |||||
| MRGMont Rigi | 9.4 | 358 | 13:20:01.38+1.81 s | 13:20:02.71+3.14 s | 1.33 |
| HOUHouvegnez | 9.7 | 214 | 13:20:01.46+1.89 s | – | – |
| TNLTernell | 18.1 | 11 | 13:20:03.03+3.46 s | 13:20:05.45+5.88 s | 2.42 |
| MEMHMembach | 20.9 | 346 | 13:20:03.53+3.96 s | 13:20:06.86+7.29 s | 3.33 |
| KLBKalborn | 36.4 | 177 | 13:20:06.09+6.52 s | – | – |
| VIAVianden | 55.4 | 171 | 13:20:09.36+9.79 s | – | – |
| Dutch seismic network (KNMI)1 station | |||||
| HGNHeimansgroeve | 39.0 | 344 | 13:20:06.81+7.24 s | 13:20:11.79+12.22 s | 4.98 |