GELBRESEE (BE)
Quarry blast8 March 2021
- Magnitude
- 1.5ML
- Depth
- –
- Belgian time
- 14:41:172021-03-08
- UTC
- 13:41:172021-03-08
Main parameters
| Date and time | 2021-03-08 13:41:17 UTC 2021-03-08 14:41:17 Belgian time |
|---|---|
| Magnitude | ML 1.5 |
| Epicentral coordinates | 50.507° N, 4.957° E Uncertainty ± 2.0 km |
| Event ID | ROB 12700 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2021-03-08 15:12:26 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
- 10
- Epicentral distance
- 16.4 – 109.2km
- Mean velocity, P wave
- 5.2km/s
- Mean velocity, S wave
- 3.0km/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: 9 measurements, root-mean-square deviation 0.32 s. S wave: 7 measurements, root-mean-square deviation 0.34 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 | nm | |
|---|---|---|---|---|---|---|
| Belgian seismic network (Royal Observatory of Belgium)10 stations | ||||||
| GESGesves | 16.4 | 146 | 13:41:19.70+1.95 s | 13:41:21.85+4.10 s | 2.15 | 148.7 |
| CLAClavier | 26.4 | 112 | 13:41:21.93+4.18 s | 13:41:25.88+8.13 s | 3.95 | – |
| MRDMaredsous | 26.4 | 211 | 13:41:22.32+4.57 s | 13:41:26.27+8.52 s | 3.95 | 27.3 |
| TGATangissart | 32.7 | 290 | 13:41:23.38+5.63 s | 13:41:27.97+10.22 s | 4.59 | 13.4 |
| RCHRochefort | 43.6 | 154 | 13:41:24.81+7.06 s | 13:41:31.29+13.54 s | 6.48 | 20.5 |
| DOUDourbes | 52.6 | 210 | 13:41:27.01+9.26 s | 13:41:34.07+16.32 s | 7.06 | – |
| MEMHMembach | 75.5 | 81 | 13:41:31.07+13.32 s | – | – | – |
| MEMSMembach | 75.5 | 81 | – | 13:41:42.29+24.54 s | – | – |
| KLBKalborn | 93.7 | 118 | 13:41:34.36+16.61 s | – | – | – |
| VIAVianden | 109.2 | 125 | 13:41:38.25+20.50 s | – | – | – |