WAIMES (BE)
Quarry blast16 March 2020
- Magnitude
- 1.0ML
- Depth
- –
- Belgian time
- 13:21:542020-03-16
- UTC
- 12:21:542020-03-16
Main parameters
| Date and time | 2020-03-16 12:21:54 UTC 2020-03-16 13:21:54 Belgian time |
|---|---|
| Magnitude | ML 1.0 |
| Epicentral coordinates | 50.426° N, 6.087° E Uncertainty ± 0.8 km |
| Event ID | ROB 9490 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2020-03-16 15:26:06 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
- 9.5 – 55.8km
- Mean velocity, P wave
- 5.9km/s
- Mean velocity, S wave
- 3.4km/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 0.19 s. S wave: 4 measurements, root-mean-square deviation 0.05 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 | 9.5 | 355 | 12:21:56.41+1.85 s | 12:21:57.78+3.22 s | 1.37 |
| HOUHouvegnez | 9.9 | 216 | 12:21:56.51+1.95 s | – | – |
| MEMHMembach | 21.1 | 345 | 12:21:58.76+4.20 s | 12:22:01.31+6.75 s | 2.55 |
| MEMSMembach | 21.1 | 345 | 12:21:58.81+4.25 s | – | – |
| KLBKalborn | 36.3 | 178 | 12:22:01.21+6.65 s | 12:22:05.66+11.10 s | 4.45 |
| VIAVianden | 55.2 | 171 | 12:22:04.22+9.66 s | – | – |
| CLAClavier | 55.8 | 269 | 12:22:04.32+9.76 s | – | – |
| Dutch seismic network (KNMI)1 station | |||||
| HGNHeimansgroeve | 39.2 | 344 | 12:22:01.93+7.37 s | 12:22:06.51+11.95 s | 4.58 |