WAIMES (BE)
Quarry blast2 April 2020
- Magnitude
- 1.1ML
- Depth
- –
- Belgian time
- 11:36:312020-04-02
- UTC
- 09:36:312020-04-02
Main parameters
| Date and time | 2020-04-02 09:36:31 UTC 2020-04-02 11:36:31 Belgian time |
|---|---|
| Magnitude | ML 1.1 |
| Epicentral coordinates | 50.418° N, 6.098° E Uncertainty ± 1.1 km |
| Event ID | ROB 9700 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2020-04-02 11:58:39 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
- 9.7 – 40.3km
- Mean velocity, P wave
- 5.8km/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 0.13 s. S wave: 5 measurements, root-mean-square deviation 0.21 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 | 9.7 | 223 | 09:36:33.11+1.86 s | 09:36:34.61+3.36 s | 1.50 |
| MRGMont Rigi | 10.5 | 351 | 09:36:33.11+1.86 s | 09:36:34.78+3.53 s | 1.67 |
| MEMSMembach | 22.2 | 344 | 09:36:35.34+4.09 s | – | – |
| MEMHMembach | 22.2 | 344 | 09:36:35.34+4.09 s | 09:36:38.53+7.28 s | 3.19 |
| KLBKalborn | 35.4 | 179 | 09:36:37.78+6.53 s | 09:36:41.85+10.60 s | 4.07 |
| Dutch seismic network (KNMI)1 station | |||||
| HGNHeimansgroeve | 40.3 | 343 | 09:36:38.53+7.28 s | 09:36:43.62+12.37 s | 5.09 |