PECQ (BE)
Quarry blast14 October 2020
- Magnitude
- 2.0ML
- Depth
- –
- Belgian time
- 13:00:462020-10-14
- UTC
- 11:00:462020-10-14
Main parameters
| Date and time | 2020-10-14 11:00:46 UTC 2020-10-14 13:00:46 Belgian time |
|---|---|
| Magnitude | ML 2.0 |
| Epicentral coordinates | 50.715° N, 3.361° E Uncertainty ± 2.0 km |
| Event ID | ROB 11065 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2020-10-15 11:59:07 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
- 60.7 – 396.1km
- Mean velocity, P wave
- 9.7km/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 6.20 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 | |||||
| BRQBracquegnies | 60.7 | 115 | 11:00:58.09+12.09 s | – | – |
| RQRRonquières | 62.3 | 101 | 11:00:58.32+12.32 s | – | – |
| UCCSUccle | 71.1 | 82 | 11:01:15.85+29.85 s | – | – |
| MRDMaredsous | 109.9 | 114 | 11:01:08.09+22.09 s | – | – |
| DOUDourbes | 111.6 | 128 | 11:01:05.76+19.76 s | – | – |
| GESGesves | 127.7 | 106 | 11:01:10.32+24.32 s | – | – |
| CLAClavier | 141.4 | 103 | 11:01:11.98+25.98 s | – | – |
| British Geological Survey (United Kingdom)1 station | |||||
| LMKMarket Rasen | 396.1 | 322 | 11:01:24.47+38.47 s | – | – |