COMBLAIN-AU-PONT (BE)
Quarry blast26 October 2020
- Magnitude
- 1.5ML
- Depth
- –
- Belgian time
- 15:00:252020-10-26
- UTC
- 14:00:252020-10-26
Main parameters
| Date and time | 2020-10-26 14:00:25 UTC 2020-10-26 15:00:25 Belgian time |
|---|---|
| Magnitude | ML 1.5 |
| Epicentral coordinates | 50.477° N, 5.611° E Uncertainty ± 0.2 km |
| Event ID | ROB 11160 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2020-10-26 15:17:34 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
- 18.1 – 45.1km
- Mean velocity, P wave
- 5.6km/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: 9 measurements, root-mean-square deviation 0.18 s. S wave: 4 measurements, root-mean-square deviation 0.12 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)7 stations | |||||
| LCHLa Chartreuse | 18.1 | 357 | 14:00:28.70+3.45 s | – | – |
| CLAClavier | 22.8 | 254 | 14:00:29.47+4.22 s | 14:00:32.54+7.29 s | 3.07 |
| HOUHouvegnez | 31.2 | 116 | 14:00:30.93+5.68 s | – | – |
| MEMSMembach | 31.9 | 62 | 14:00:30.78+5.53 s | – | – |
| MEMHMembach | 31.9 | 62 | 14:00:30.81+5.56 s | 14:00:35.19+9.94 s | 4.38 |
| MRGMont Rigi | 33.2 | 83 | 14:00:31.09+5.84 s | 14:00:35.51+10.26 s | 4.42 |
| EBNEben-Emael | 36.0 | 8 | 14:00:31.73+6.48 s | – | – |
| Dutch seismic network (KNMI)2 stations | |||||
| HGNHeimansgroeve | 39.2 | 35 | 14:00:32.60+7.35 s | 14:00:37.25+12.00 s | 4.65 |
| VKBValkenburg | 45.1 | 16 | 14:00:33.66+8.41 s | – | – |