ROCHEFORT (BE)
Quarry blast9 April 2020
- Magnitude
- 1.6ML
- Depth
- –
- Belgian time
- 12:35:092020-04-09
- UTC
- 10:35:092020-04-09
Main parameters
| Date and time | 2020-04-09 10:35:09 UTC 2020-04-09 12:35:09 Belgian time |
|---|---|
| Magnitude | ML 1.6 |
| Epicentral coordinates | 50.164° N, 5.259° E Uncertainty ± 0.3 km |
| Event ID | ROB 9795 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2020-04-09 14:11:00 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
- 8
- Epicentral distance
- 2.5 – 69.7km
- Mean velocity, P wave
- 5.9km/s
- Mean velocity, S wave
- 3.3km/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: 8 measurements, root-mean-square deviation 0.12 s. S wave: 5 measurements, root-mean-square deviation 0.14 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)8 stations | |||||
| RCHRochefort | 2.5 | 246 | 10:35:09.87+0.44 s | – | – |
| GESGesves | 27.5 | 334 | 10:35:14.44+5.01 s | 10:35:18.05+8.62 s | 3.61 |
| CLAClavier | 28.5 | 6 | 10:35:14.64+5.21 s | 10:35:18.45+9.02 s | 3.81 |
| MRDMaredsous | 38.3 | 294 | 10:35:16.30+6.87 s | 10:35:21.04+11.61 s | 4.74 |
| DOUDourbes | 48.1 | 261 | 10:35:17.91+8.48 s | 10:35:24.23+14.80 s | 6.32 |
| HOUHouvegnez | 57.2 | 68 | 10:35:19.48+10.05 s | – | – |
| KLBKalborn | 61.2 | 96 | 10:35:19.96+10.53 s | 10:35:27.89+18.46 s | 7.93 |
| MRGMont Rigi | 69.7 | 56 | 10:35:21.60+12.17 s | – | – |