ROCHEFORT (BE)
Quarry blast18 June 2020
- Magnitude
- 1.4ML
- Depth
- –
- Belgian time
- 12:22:542020-06-18
- UTC
- 10:22:542020-06-18
Main parameters
| Date and time | 2020-06-18 10:22:54 UTC 2020-06-18 12:22:54 Belgian time |
|---|---|
| Magnitude | ML 1.4 |
| Epicentral coordinates | 50.184° N, 5.243° E Uncertainty ± 1.4 km |
| Event ID | ROB 10295 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2020-06-18 13:11:03 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
- 6
- Epicentral distance
- 3.5 – 97.5km
- Mean velocity, P wave
- 5.5km/s
- Mean velocity, S wave
- 3.1km/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: 6 measurements, root-mean-square deviation 0.34 s. S wave: 6 measurements, root-mean-square deviation 0.69 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 | |||||
| RCHRochefort | 3.5 | 199 | 10:22:54.48+0.21 s | 10:22:55.50+1.23 s | 1.02 |
| GESGesves | 24.9 | 334 | 10:22:58.61+4.34 s | 10:23:02.03+7.76 s | 3.42 |
| CLAClavier | 26.4 | 9 | 10:22:58.80+4.53 s | 10:23:02.87+8.60 s | 4.07 |
| DOUDourbes | 47.4 | 258 | 10:23:02.26+7.99 s | 10:23:08.71+14.44 s | 6.45 |
| KLBKalborn | 62.6 | 98 | 10:23:04.59+10.32 s | 10:23:12.95+18.68 s | 8.36 |
| SKQSteenkerque | 97.5 | 302 | 10:23:11.94+17.67 s | 10:23:26.27+32.00 s | 14.33 |