WELLIN (BE)
Quarry blast4 March 2020
- Magnitude
- 1.4ML
- Depth
- –
- Belgian time
- 13:29:482020-03-04
- UTC
- 12:29:482020-03-04
Main parameters
| Date and time | 2020-03-04 12:29:48 UTC 2020-03-04 13:29:48 Belgian time |
|---|---|
| Magnitude | ML 1.4 |
| Epicentral coordinates | 50.083° N, 5.112° E Uncertainty ± 2.8 km |
| Event ID | ROB 9380 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2020-03-04 15:37:26 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
- 11.5 – 39.8km
- Mean velocity, P wave
- 5.8km/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: 4 measurements, root-mean-square deviation 0.12 s. S wave: 4 measurements, root-mean-square deviation 0.28 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 | 11.5 | 46 | 12:29:51.03+2.17 s | 12:29:52.80+3.94 s | 1.77 |
| GESGesves | 33.7 | 357 | 12:29:55.15+6.29 s | 12:29:59.00+10.14 s | 3.85 |
| DOUDourbes | 37.0 | 272 | 12:29:55.44+6.58 s | 12:30:00.28+11.42 s | 4.84 |
| CLAClavier | 39.8 | 20 | 12:29:56.03+7.17 s | 12:30:01.60+12.74 s | 5.57 |