HOLZTHUM (LU)
Quarry blast9 June 2020
- Magnitude
- 1.7ML
- Depth
- –
- Belgian time
- 15:18:252020-06-09
- UTC
- 13:18:252020-06-09
Main parameters
| Date and time | 2020-06-09 13:18:25 UTC 2020-06-09 15:18:25 Belgian time |
|---|---|
| Magnitude | ML 1.7 |
| Epicentral coordinates | 49.984° N, 6.082° E Uncertainty ± 1.1 km |
| Event ID | ROB 10205 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2020-06-10 15:08:17 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
- 10.2 – 107.2km
- Mean velocity, P wave
- 5.9km/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: 8 measurements, root-mean-square deviation 0.25 s. S wave: 7 measurements, root-mean-square deviation 0.62 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)8 stations | |||||
| VIAVianden | 10.2 | 122 | 13:18:27.14+1.98 s | 13:18:29.07+3.91 s | 1.93 |
| KLBKalborn | 13.1 | 9 | 13:18:27.56+2.40 s | 13:18:29.72+4.56 s | 2.16 |
| HOUHouvegnez | 41.6 | 352 | 13:18:32.35+7.19 s | 13:18:37.24+12.08 s | 4.89 |
| MRGMont Rigi | 58.7 | 360 | 13:18:35.33+10.17 s | 13:18:43.21+18.05 s | 7.88 |
| RCHRochefort | 64.1 | 288 | 13:18:36.99+11.83 s | 13:18:43.26+18.10 s | 6.27 |
| MEMHMembach | 69.7 | 356 | 13:18:37.28+12.12 s | 13:18:45.84+20.68 s | 8.56 |
| GESGesves | 83.9 | 303 | 13:18:39.62+14.46 s | – | – |
| DOUDourbes | 107.2 | 277 | 13:18:43.54+18.38 s | 13:18:57.80+32.64 s | 14.26 |