VOHWINKEL (DE)
Quarry blast31 January 2020
- Magnitude
- 2.2ML
- Depth
- –
- Belgian time
- 11:39:582020-01-31
- UTC
- 10:39:582020-01-31
Main parameters
| Date and time | 2020-01-31 10:39:58 UTC 2020-01-31 11:39:58 Belgian time |
|---|---|
| Magnitude | ML 2.2 |
| Epicentral coordinates | 51.220° N, 7.059° E Uncertainty ± 2.6 km |
| Event ID | ROB 9210 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2020-01-31 11:47:11 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
- 9
- Epicentral distance
- 85.0 – 214.5km
- Mean velocity, P wave
- 4.9km/s
- Mean velocity, S wave
- 3.0km/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 0.49 s. S wave: 5 measurements, root-mean-square deviation 0.76 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 | |||||
| MEMHMembach | 100.3 | 228 | 10:40:15.75+16.79 s | 10:40:27.88+28.92 s | 12.13 |
| EBNEben-Emael | 107.7 | 245 | – | 10:40:31.67+32.71 s | – |
| KLBKalborn | 141.5 | 209 | 10:40:22.20+23.24 s | 10:40:38.93+39.97 s | 16.73 |
| CLAClavier | 152.5 | 235 | 10:40:24.12+25.16 s | 10:40:42.34+43.38 s | 18.22 |
| RCHRochefort | 175.5 | 228 | – | 10:40:47.49+48.53 s | – |
| DOUDourbes | 214.5 | 235 | – | 10:40:57.54+58.58 s | – |
| Dutch seismic network (KNMI)3 stations | |||||
| WTSBWinterswijk New | 85.0 | 348 | 10:40:13.72+14.76 s | 10:40:23.13+24.17 s | 9.41 |
| HGNHeimansgroeve | 94.0 | 238 | 10:40:14.86+15.90 s | 10:40:27.62+28.66 s | 12.76 |
| VKBValkenburg | 97.6 | 247 | 10:40:16.36+17.40 s | 10:40:28.80+29.84 s | 12.44 |