WAIMES (BE)
Quarry blast22 September 2020
- Magnitude
- 1.3ML
- Depth
- –
- Belgian time
- 12:04:492020-09-22
- UTC
- 10:04:492020-09-22
Main parameters
| Date and time | 2020-09-22 10:04:49 UTC 2020-09-22 12:04:49 Belgian time |
|---|---|
| Magnitude | ML 1.3 |
| Epicentral coordinates | 50.420° N, 6.083° E Uncertainty ± 1.6 km |
| Event ID | ROB 10930 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2020-09-22 13:35:05 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
- 9.2 – 50.8km
- Mean velocity, P wave
- 5.9km/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 0.23 s. S wave: 4 measurements, root-mean-square deviation 0.24 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 | |||||
| HOUHouvegnez | 9.2 | 217 | 10:04:51.25+1.83 s | – | – |
| MRGMont Rigi | 10.2 | 357 | 10:04:50.98+1.56 s | 10:04:52.96+3.54 s | 1.98 |
| MEMHMembach | 21.7 | 346 | 10:04:53.32+3.90 s | 10:04:56.50+7.08 s | 3.18 |
| MEMSMembach | 21.7 | 346 | 10:04:53.56+4.14 s | – | – |
| KLBKalborn | 35.6 | 177 | 10:04:55.94+6.52 s | 10:05:00.37+10.95 s | 4.43 |
| EBNEben-Emael | 50.8 | 326 | 10:04:58.04+8.62 s | – | – |
| Dutch seismic network (KNMI)1 station | |||||
| HGNHeimansgroeve | 39.8 | 344 | 10:04:56.60+7.18 s | 10:05:02.30+12.88 s | 5.70 |