GEROLSTEIN (DE)
Quarry blast24 March 2020
- Magnitude
- 1.6ML
- Depth
- –
- Belgian time
- 12:36:222020-03-24
- UTC
- 11:36:222020-03-24
Main parameters
| Date and time | 2020-03-24 11:36:22 UTC 2020-03-24 12:36:22 Belgian time |
|---|---|
| Magnitude | ML 1.6 |
| Epicentral coordinates | 50.248° N, 6.678° E Uncertainty ± 2.3 km |
| Event ID | ROB 9580 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2020-03-24 13:19:39 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
- 8
- Epicentral distance
- 43.9 – 149.8km
- Mean velocity, P wave
- 5.8km/s
- Mean velocity, S wave
- 3.4km/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 0.34 s. S wave: 5 measurements, root-mean-square deviation 0.50 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)7 stations | |||||
| KLBKalborn | 43.9 | 248 | 11:36:28.66+6.49 s | 11:36:35.21+13.04 s | 6.55 |
| VIAVianden | 48.8 | 225 | 11:36:30.03+7.86 s | 11:36:36.45+14.28 s | 6.42 |
| HOUHouvegnez | 49.4 | 284 | 11:36:30.26+8.09 s | 11:36:35.85+13.68 s | 5.59 |
| MRGMont Rigi | 51.9 | 304 | – | 11:36:37.49+15.32 s | – |
| MEMHMembach | 62.2 | 310 | 11:36:31.98+9.81 s | 11:36:39.43+17.26 s | 7.45 |
| MRDMaredsous | 136.3 | 273 | – | 11:37:02.12+39.95 s | – |
| DOUDourbes | 149.8 | 264 | 11:36:46.75+24.58 s | 11:37:05.80+43.63 s | 19.05 |
| Dutch seismic network (KNMI)1 station | |||||
| HGNHeimansgroeve | 78.1 | 318 | 11:36:35.48+13.31 s | – | – |