BASTOGNE (BE)
Quarry blast2 July 2021
- Magnitude
- 1.2ML
- Depth
- –
- Belgian time
- 14:54:532021-07-02
- UTC
- 12:54:532021-07-02
Main parameters
| Date and time | 2021-07-02 12:54:53 UTC 2021-07-02 14:54:53 Belgian time |
|---|---|
| Magnitude | ML 1.2 |
| Epicentral coordinates | 50.039° N, 5.833° E Uncertainty ± 1.0 km |
| Event ID | ROB 13835 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2021-07-05 12:24:41 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
- 20.9 – 65.7km
- Mean velocity, P wave
- 5.8km/s
- Mean velocity, S wave
- 3.4km/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 0.16 s. S wave: 6 measurements, root-mean-square deviation 0.31 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 | |||||
| KLBKalborn | 20.9 | 71 | 12:54:57.25+3.71 s | 12:55:00.29+6.75 s | 3.04 |
| VIAVianden | 28.8 | 113 | 12:54:59.10+5.56 s | 12:55:02.48+8.94 s | 3.38 |
| HOUHouvegnez | 37.1 | 19 | 12:55:00.35+6.81 s | 12:55:05.13+11.59 s | 4.78 |
| RCHRochefort | 45.3 | 287 | 12:55:01.85+8.31 s | 12:55:06.56+13.02 s | 4.71 |
| CLAClavier | 56.8 | 318 | 12:55:03.70+10.16 s | 12:55:10.72+17.18 s | 7.02 |
| TNLTernell | 64.4 | 19 | 12:55:04.82+11.28 s | – | – |
| MEMHMembach | 64.6 | 11 | 12:55:05.19+11.65 s | 12:55:12.92+19.38 s | 7.73 |
| GESGesves | 65.7 | 306 | 12:55:05.38+11.84 s | – | – |