MARCHE-EN-FAMENNE (BE)
Quarry blast27 August 2021
- Magnitude
- 1.3ML
- Depth
- –
- Belgian time
- 11:44:382021-08-27
- UTC
- 09:44:382021-08-27
Main parameters
| Date and time | 2021-08-27 09:44:38 UTC 2021-08-27 11:44:38 Belgian time |
|---|---|
| Magnitude | ML 1.3 |
| Epicentral coordinates | 50.185° N, 5.260° E Uncertainty ± 0.4 km |
| Event ID | ROB 14365 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2021-08-30 09:58:41 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
- 5
- Epicentral distance
- 4.1 – 61.4km
- 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: 5 measurements, root-mean-square deviation 0.17 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)5 stations | |||||
| RCHRochefort | 4.1 | 215 | 09:44:39.40+0.84 s | 09:44:39.95+1.39 s | 0.55 |
| GESGesves | 25.4 | 331 | 09:44:43.52+4.96 s | 09:44:46.65+8.09 s | 3.13 |
| CLAClavier | 26.1 | 7 | 09:44:43.26+4.70 s | – | – |
| DOUDourbes | 48.6 | 258 | 09:44:47.23+8.67 s | 09:44:53.30+14.74 s | 6.07 |
| KLBKalborn | 61.4 | 99 | 09:44:49.31+10.75 s | – | – |
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