HAM-SUR-MEUSE (FR)
Quarry blast10 April 2020
- Magnitude
- 1.6ML
- Depth
- –
- Belgian time
- 11:03:572020-04-10
- UTC
- 09:03:572020-04-10
Main parameters
| Date and time | 2020-04-10 09:03:57 UTC 2020-04-10 11:03:57 Belgian time |
|---|---|
| Magnitude | ML 1.6 |
| Epicentral coordinates | 50.105° N, 4.778° E Uncertainty ± 1.3 km |
| Event ID | ROB 9805 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2020-05-05 08:15:02 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
- 13.1 – 51.1km
- 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: 5 measurements, root-mean-square deviation 0.29 s. S wave: 5 measurements, root-mean-square deviation 0.25 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 | |||||
| DOUDourbes | 13.1 | 265 | 09:03:59.87+2.45 s | 09:04:02.11+4.69 s | 2.24 |
| MRDMaredsous | 21.9 | 358 | 09:04:01.23+3.81 s | 09:04:04.17+6.75 s | 2.94 |
| RCHRochefort | 32.6 | 80 | 09:04:03.03+5.61 s | 09:04:07.48+10.06 s | 4.45 |
| GESGesves | 38.1 | 35 | 09:04:04.53+7.11 s | 09:04:09.25+11.83 s | 4.72 |
| CLAClavier | 51.1 | 47 | 09:04:07.23+9.81 s | 09:04:13.15+15.73 s | 5.92 |