COUVIN (BE)
Quarry blast27 March 2020
- Magnitude
- 1.3ML
- Depth
- –
- Belgian time
- 14:05:512020-03-27
- UTC
- 13:05:512020-03-27
Main parameters
| Date and time | 2020-03-27 13:05:51 UTC 2020-03-27 14:05:51 Belgian time |
|---|---|
| Magnitude | ML 1.3 |
| Epicentral coordinates | 50.040° N, 4.485° E Uncertainty ± 2.8 km |
| Event ID | ROB 9655 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2020-03-27 16:12:23 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
- 10.0 – 57.6km
- Mean velocity, P wave
- 5.5km/s
- Mean velocity, S wave
- 3.2km/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 0.22 s. S wave: 4 measurements, root-mean-square deviation 0.32 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 | |||||
| DOUDourbes | 10.0 | 52 | 13:05:53.48+1.52 s | 13:05:55.41+3.45 s | 1.93 |
| MRDMaredsous | 35.5 | 35 | 13:05:57.97+6.01 s | 13:06:02.65+10.69 s | 4.68 |
| RCHRochefort | 54.6 | 76 | 13:06:01.69+9.73 s | 13:06:08.51+16.55 s | 6.82 |
| GESGesves | 57.6 | 48 | 13:06:02.52+10.56 s | 13:06:10.02+18.06 s | 7.50 |