WAIMES (BE)
Quarry blast12 May 2021
- Magnitude
- 1.0ML
- Depth
- –
- Belgian time
- 11:00:322021-05-12
- UTC
- 09:00:322021-05-12
Main parameters
| Date and time | 2021-05-12 09:00:32 UTC 2021-05-12 11:00:32 Belgian time |
|---|---|
| Magnitude | ML 1.0 |
| Epicentral coordinates | 50.419° N, 6.100° E Uncertainty ± 1.0 km |
| Event ID | ROB 13430 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2021-05-17 10:16:40 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
- 5
- Epicentral distance
- 9.8 – 35.4km
- Mean velocity, P wave
- 6.2km/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: 5 measurements, root-mean-square deviation 0.19 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 | 9.8 | 223 | 09:00:34.53+1.88 s | 09:00:36.15+3.50 s | 1.62 |
| MRGMont Rigi | 10.4 | 350 | 09:00:34.47+1.82 s | 09:00:36.69+4.04 s | 2.22 |
| MEMHMembach | 22.1 | 343 | 09:00:36.58+3.93 s | 09:00:39.82+7.17 s | 3.24 |
| MEMSMembach | 22.1 | 343 | 09:00:36.61+3.96 s | 09:00:39.93+7.28 s | 3.32 |
| KLBKalborn | 35.4 | 179 | 09:00:39.05+6.40 s | 09:00:43.71+11.06 s | 4.66 |