PECQ (BE)
Quarry blast14 July 2020
- Magnitude
- 1.9ML
- Depth
- –
- Belgian time
- 13:00:122020-07-14
- UTC
- 11:00:122020-07-14
Main parameters
| Date and time | 2020-07-14 11:00:12 UTC 2020-07-14 13:00:12 Belgian time |
|---|---|
| Magnitude | ML 1.9 |
| Epicentral coordinates | 50.663° N, 3.389° E Uncertainty ± 6.2 km |
| Event ID | ROB 10465 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2020-07-14 17:10:02 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
- 32.5 – 203.3km
- Mean velocity, P wave
- 7.0km/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 0.08 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)9 stations | |||||
| LESLessines | 32.5 | 80 | 11:00:19.03+6.25 s | 11:00:22.95+10.17 s | 3.92 |
| SKQSteenkerque | 48.9 | 92 | 11:00:21.17+8.39 s | 11:00:27.51+14.73 s | 6.34 |
| BOUBougnies | 49.8 | 127 | 11:00:21.48+8.70 s | – | – |
| BRQBracquegnies | 56.6 | 111 | 11:00:22.40+9.62 s | – | – |
| RQRRonquières | 59.5 | 96 | 11:00:22.90+10.12 s | – | – |
| GESGesves | 124.3 | 104 | 11:00:33.54+20.76 s | 11:00:50.40+37.62 s | 16.86 |
| CLAClavier | 138.3 | 101 | 11:00:35.79+23.01 s | 11:00:54.19+41.41 s | 18.40 |
| RCHRochefort | 142.3 | 113 | 11:00:37.53+24.75 s | 11:00:53.76+40.98 s | 16.23 |
| KLBKalborn | 203.3 | 107 | 11:00:45.65+32.87 s | – | – |