KERPEN (DE)
Quarry blast2 April 2020
- Magnitude
- 1.3ML
- Depth
- –
- Belgian time
- 12:47:022020-04-02
- UTC
- 10:47:022020-04-02
Main parameters
| Date and time | 2020-04-02 10:47:02 UTC 2020-04-02 12:47:02 Belgian time |
|---|---|
| Magnitude | ML 1.3 |
| Epicentral coordinates | 50.312° N, 6.750° E Uncertainty ± 2.5 km |
| Event ID | ROB 9705 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2020-04-02 13:27:13 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
- 7
- Epicentral distance
- 51.5 – 155.7km
- 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: 6 measurements, root-mean-square deviation 0.10 s.
Stations farther than 120 km are left out of the fit: the first waves to reach them have travelled beneath the crust, through the mantle, where they propagate faster.
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)6 stations | |||||
| KLBKalborn | 51.5 | 243 | 10:47:10.82+8.55 s | 10:47:17.52+15.25 s | 6.70 |
| MRGMont Rigi | 52.8 | 295 | 10:47:11.13+8.86 s | – | – |
| HOUHouvegnez | 53.2 | 275 | 10:47:11.01+8.74 s | – | – |
| MEMHMembach | 62.1 | 302 | 10:47:12.45+10.18 s | 10:47:20.48+18.21 s | 8.03 |
| MEMSMembach | 62.1 | 302 | 10:47:12.48+10.21 s | – | – |
| DOUDourbes | 155.7 | 262 | 10:47:28.60+26.33 s | 10:47:47.95+45.68 s | 19.35 |
| Dutch seismic network (KNMI)1 station | |||||
| HGNHeimansgroeve | 76.8 | 311 | 10:47:15.22+12.95 s | – | – |