LEUDERSDORF (DE)
Quarry blast27 May 2020
- Magnitude
- 1.6ML
- Depth
- –
- Belgian time
- 11:26:492020-05-27
- UTC
- 09:26:492020-05-27
Main parameters
| Date and time | 2020-05-27 09:26:49 UTC 2020-05-27 11:26:49 Belgian time |
|---|---|
| Magnitude | ML 1.6 |
| Epicentral coordinates | 50.341° N, 6.736° E Uncertainty ± 2.6 km |
| Event ID | ROB 10115 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2020-05-27 17:12:26 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
- 50.6 – 155.2km
- 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: 6 measurements, root-mean-square deviation 0.22 s. S wave: 4 measurements, root-mean-square deviation 0.09 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 | |||||
| MRGMont Rigi | 50.6 | 292 | 09:26:58.81+9.03 s | 09:27:04.99+15.21 s | 6.18 |
| HOUHouvegnez | 52.1 | 272 | 09:26:58.81+9.03 s | – | – |
| KLBKalborn | 52.2 | 239 | 09:26:58.54+8.76 s | 09:27:05.36+15.58 s | 6.82 |
| VIAVianden | 59.1 | 220 | 09:26:59.74+9.96 s | – | – |
| MEMHMembach | 59.5 | 300 | 09:27:00.33+10.55 s | 09:27:07.47+17.69 s | 7.14 |
| DOUDourbes | 155.2 | 261 | 09:27:16.28+26.50 s | 09:27:35.97+46.19 s | 19.69 |
| Dutch seismic network (KNMI)1 station | |||||
| HGNHeimansgroeve | 73.9 | 310 | 09:27:02.86+13.08 s | 09:27:12.02+22.24 s | 9.16 |