COMBLAIN-AU-PONT (BE)
Quarry blast2 June 2021
- Magnitude
- 1.4ML
- Depth
- –
- Belgian time
- 13:03:012021-06-02
- UTC
- 11:03:012021-06-02
Main parameters
| Date and time | 2021-06-02 11:03:01 UTC 2021-06-02 13:03:01 Belgian time |
|---|---|
| Magnitude | ML 1.4 |
| Epicentral coordinates | 50.502° N, 5.564° E Uncertainty ± 1.3 km |
| Event ID | ROB 13580 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2021-06-08 10:12:20 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
- 20.7 – 59.2km
- Mean velocity, P wave
- 6.6km/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: 5 measurements, root-mean-square deviation 0.36 s. S wave: 5 measurements, root-mean-square deviation 0.26 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)4 stations | |||||
| CLAClavier | 20.7 | 244 | 11:03:04.68+3.56 s | 11:03:07.95+6.83 s | 3.27 |
| MEMHMembach | 33.8 | 69 | 11:03:07.52+6.40 s | 11:03:12.37+11.25 s | 4.85 |
| GESGesves | 36.3 | 249 | 11:03:07.67+6.55 s | 11:03:12.70+11.58 s | 5.03 |
| KLBKalborn | 59.2 | 139 | 11:03:10.98+9.86 s | 11:03:19.14+18.02 s | 8.16 |
| Dutch seismic network (KNMI)1 station | |||||
| HGNHeimansgroeve | 39.1 | 42 | 11:03:07.41+6.29 s | 11:03:13.25+12.13 s | 5.84 |