MARCHE-EN-FAMENNE (BE)
Quarry blast7 February 2020
- Magnitude
- 1.8ML
- Depth
- –
- Belgian time
- 12:36:432020-02-07
- UTC
- 11:36:432020-02-07
Main parameters
| Date and time | 2020-02-07 11:36:43 UTC 2020-02-07 12:36:43 Belgian time |
|---|---|
| Magnitude | ML 1.8 |
| Epicentral coordinates | 50.175° N, 5.264° E Uncertainty ± 0.7 km |
| Event ID | ROB 9265 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2020-02-10 12:51:06 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
- 11
- Epicentral distance
- 3.4 – 71.8km
- Mean velocity, P wave
- 5.5km/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: 11 measurements, root-mean-square deviation 0.47 s. S wave: 7 measurements, root-mean-square deviation 0.22 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)11 stations | |||||
| RCHRochefort | 3.4 | 231 | 11:36:44.56+0.74 s | 11:36:45.15+1.33 s | 0.59 |
| GESGesves | 26.6 | 332 | 11:36:48.64+4.82 s | 11:36:52.29+8.47 s | 3.65 |
| CLAClavier | 27.3 | 6 | 11:36:48.86+5.04 s | 11:36:52.45+8.63 s | 3.59 |
| MRDMaredsous | 38.1 | 292 | 11:36:50.62+6.80 s | 11:36:55.17+11.35 s | 4.55 |
| DOUDourbes | 48.6 | 260 | 11:36:52.36+8.54 s | 11:36:58.39+14.57 s | 6.03 |
| HOUHouvegnez | 56.5 | 69 | 11:36:53.82+10.00 s | 11:37:00.86+17.04 s | 7.04 |
| LCHLa Chartreuse | 56.9 | 25 | 11:36:54.06+10.24 s | – | – |
| KLBKalborn | 61.0 | 97 | 11:36:54.02+10.20 s | 11:37:02.26+18.44 s | 8.24 |
| MRGMont Rigi | 68.8 | 57 | 11:36:56.18+12.36 s | – | – |
| MEMSMembach | 71.8 | 47 | 11:36:57.68+13.86 s | – | – |
| MEMHMembach | 71.8 | 47 | 11:36:57.71+13.89 s | – | – |