HERINNES-LES-PECQ (BE)
Quarry blast3 March 2017
- Magnitude
- 1.4ML
- Depth
- 9.5km ± 4.3
- Belgian time
- 13:00:202017-03-03
- UTC
- 12:00:202017-03-03
Main parameters
| Date and time | 2017-03-03 12:00:20 UTC 2017-03-03 13:00:20 Belgian time |
|---|---|
| Magnitude | ML 1.4 |
| Epicentral coordinates | 50.700° N, 3.395° E Uncertainty ± 12.3 km |
| Depth of hypocenter | 9.5 ± 4.3 km |
| Event ID | ROB 5648 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2017-03-03 13:23:08 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
- 7
- Epicentral distance
- 31.7 – 138.7km
- Mean velocity, P wave
- 7.6km/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. Hypocenter at a depth of 9.5 km. P wave: 5 measurements, root-mean-square deviation 0.11 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 | nm | |
|---|---|---|---|---|---|---|
| Belgian seismic network (Royal Observatory of Belgium)7 stations | ||||||
| LESLessines | 31.7 | 88 | 12:00:27.21+6.29 s | 12:00:30.94+10.02 s | 3.73 | – |
| SKQSteenkerque | 48.8 | 96 | 12:00:29.41+8.49 s | – | – | – |
| BOUBougnies | 52.1 | 131 | – | 12:00:36.45+15.53 s | – | – |
| BRQBracquegnies | 57.9 | 115 | 12:00:30.37+9.45 s | 12:00:38.51+17.59 s | 8.14 | 13.6 |
| RQRRonquières | 59.6 | 100 | 12:00:30.71+9.79 s | – | – | – |
| SNFSeneffe | 66.4 | 108 | 12:00:31.81+10.89 s | – | – | – |
| CLAClavier | 138.7 | 102 | 12:00:43.85+22.93 s | 12:01:01.40+40.48 s | 17.55 | – |