ROCHEFORT (BE)
Quarry blast26 October 2021
- Magnitude
- 1.7ML
- Depth
- –
- Belgian time
- 11:42:062021-10-26
- UTC
- 09:42:062021-10-26
Main parameters
| Date and time | 2021-10-26 09:42:06 UTC 2021-10-26 11:42:06 Belgian time |
|---|---|
| Magnitude | ML 1.7 |
| Epicentral coordinates | 50.160° N, 5.261° E Uncertainty ± 0.7 km |
| Event ID | ROB 14695 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2021-11-08 14:18:01 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
- 4
- Epicentral distance
- 2.5 – 61.0km
- Mean velocity, P wave
- 5.7km/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: 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)4 stations | |||||
| RCHRochefort | 2.5 | 258 | 09:42:07.20+0.49 s | 09:42:07.95+1.24 s | 0.75 |
| CLAClavier | 29.0 | 6 | 09:42:11.87+5.16 s | 09:42:15.92+9.21 s | 4.05 |
| DOUDourbes | 48.1 | 262 | 09:42:15.25+8.54 s | 09:42:21.17+14.46 s | 5.92 |
| KLBKalborn | 61.0 | 96 | 09:42:17.35+10.64 s | – | – |
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