AMAY (BE)
Quarry blast7 December 2020
- Magnitude
- 1.5ML
- Depth
- –
- Belgian time
- 12:58:582020-12-07
- UTC
- 11:58:582020-12-07
Main parameters
| Date and time | 2020-12-07 11:58:58 UTC 2020-12-07 12:58:58 Belgian time |
|---|---|
| Magnitude | ML 1.5 |
| Epicentral coordinates | 50.562° N, 5.343° E Uncertainty ± 1.6 km |
| Event ID | ROB 11490 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2020-12-08 16:02:44 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
- 16.2 – 74.9km
- Mean velocity, P wave
- 5.9km/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: 8 measurements, root-mean-square deviation 0.40 s. S wave: 8 measurements, root-mean-square deviation 0.60 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)6 stations | |||||
| CLAClavier | 16.2 | 190 | 11:59:00.72+2.65 s | 11:59:03.31+5.24 s | 2.59 |
| LCHLa Chartreuse | 20.0 | 65 | 11:59:02.06+3.99 s | 11:59:04.21+6.14 s | 2.15 |
| GESGesves | 26.8 | 223 | 11:59:02.78+4.71 s | 11:59:07.34+9.27 s | 4.56 |
| RCHRochefort | 46.0 | 190 | 11:59:05.71+7.64 s | 11:59:10.99+12.92 s | 5.28 |
| MRGMont Rigi | 52.2 | 96 | 11:59:07.20+9.13 s | 11:59:14.56+16.49 s | 7.36 |
| KLBKalborn | 74.9 | 133 | 11:59:11.75+13.68 s | 11:59:20.71+22.64 s | 8.96 |
| Dutch seismic network (KNMI)2 stations | |||||
| VKBValkenburg | 46.0 | 42 | 11:59:05.98+7.91 s | 11:59:11.93+13.86 s | 5.95 |
| HGNHeimansgroeve | 47.3 | 61 | 11:59:05.75+7.68 s | 11:59:12.95+14.88 s | 7.20 |