ROCHEFORT (BE)
Quarry blast22 January 2020
- Magnitude
- 1.5ML
- Depth
- –
- Belgian time
- 11:56:502020-01-22
- UTC
- 10:56:502020-01-22
Main parameters
| Date and time | 2020-01-22 10:56:50 UTC 2020-01-22 11:56:50 Belgian time |
|---|---|
| Magnitude | ML 1.5 |
| Epicentral coordinates | 50.160° N, 5.258° E Uncertainty ± 0.4 km |
| Event ID | ROB 9175 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2020-01-23 12:03:57 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
- 7
- Epicentral distance
- 2.3 – 72.1km
- Mean velocity, P wave
- 12.7km/s
- Mean velocity, S wave
- 3.8km/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: 7 measurements, root-mean-square deviation 3.40 s. S wave: 6 measurements, root-mean-square deviation 0.76 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 | |||||
| RCHRochefort | 2.3 | 256 | 10:56:51.25+0.43 s | 10:56:51.58+0.76 s | 0.33 |
| GESGesves | 27.8 | 334 | 10:56:55.92+5.10 s | 10:56:59.62+8.80 s | 3.70 |
| CLAClavier | 29.0 | 6 | 10:56:55.90+5.08 s | 10:57:00.04+9.22 s | 4.14 |
| MRDMaredsous | 38.4 | 294 | 10:56:57.50+6.68 s | 10:57:02.65+11.83 s | 5.15 |
| DOUDourbes | 48.0 | 262 | 10:56:59.29+8.47 s | 10:57:05.82+15.00 s | 6.53 |
| KLBKalborn | 61.2 | 96 | 10:57:01.49+10.67 s | 10:57:09.26+18.44 s | 7.77 |
| TGATangissart | 72.1 | 314 | 10:56:51.34+0.52 s | – | – |