WAIMES (BE)
Quarry blast4 August 2020
- Magnitude
- 1.4ML
- Depth
- –
- Belgian time
- 12:59:482020-08-04
- UTC
- 10:59:482020-08-04
Main parameters
| Date and time | 2020-08-04 10:59:48 UTC 2020-08-04 12:59:48 Belgian time |
|---|---|
| Magnitude | ML 1.4 |
| Epicentral coordinates | 50.417° N, 6.083° E Uncertainty ± 1.0 km |
| Event ID | ROB 10600 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2020-08-04 15:09:15 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
- 6
- Epicentral distance
- 8.9 – 40.1km
- Mean velocity, P wave
- 5.9km/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: 6 measurements, root-mean-square deviation 0.18 s. S wave: 4 measurements, root-mean-square deviation 0.22 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)5 stations | |||||
| HOUHouvegnez | 8.9 | 218 | 10:59:49.99+1.74 s | – | – |
| MRGMont Rigi | 10.5 | 357 | 10:59:49.87+1.62 s | 10:59:51.92+3.67 s | 2.05 |
| MEMHMembach | 22.0 | 346 | 10:59:52.18+3.93 s | 10:59:55.56+7.31 s | 3.38 |
| MEMSMembach | 22.0 | 346 | 10:59:52.29+4.04 s | – | – |
| KLBKalborn | 35.3 | 177 | 10:59:54.64+6.39 s | 10:59:59.20+10.95 s | 4.56 |
| Dutch seismic network (KNMI)1 station | |||||
| HGNHeimansgroeve | 40.1 | 345 | 10:59:55.32+7.07 s | 11:00:00.59+12.34 s | 5.27 |