ROCHEFORT (BE)
Quarry blast19 May 2020
- Magnitude
- 1.2ML
- Depth
- –
- Belgian time
- 12:59:372020-05-19
- UTC
- 10:59:372020-05-19
Main parameters
| Date and time | 2020-05-19 10:59:37 UTC 2020-05-19 12:59:37 Belgian time |
|---|---|
| Magnitude | ML 1.2 |
| Epicentral coordinates | 50.175° N, 5.238° E Uncertainty ± 0.4 km |
| Event ID | ROB 10045 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2020-05-20 09:21:44 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
- 2.4 – 73.1km
- Mean velocity, P wave
- 5.8km/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 0.09 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 | 2.4 | 199 | 10:59:37.70+0.43 s | 10:59:38.07+0.80 s | 0.37 |
| GESGesves | 25.7 | 335 | 10:59:41.89+4.62 s | – | – |
| CLAClavier | 27.5 | 10 | 10:59:42.32+5.05 s | – | – |
| MRDMaredsous | 36.4 | 293 | 10:59:43.73+6.46 s | – | – |
| DOUDourbes | 46.8 | 259 | 10:59:45.54+8.27 s | – | – |
| KLBKalborn | 62.8 | 97 | 10:59:48.14+10.87 s | – | – |
| MEMSMembach | 73.1 | 48 | 10:59:49.99+12.72 s | – | – |
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