DEUX-ACREN (BE)
Quarry blast19 October 2016
- Magnitude
- 1.5ML
- Depth
- 2.8km ± 3.0
- Belgian time
- 11:28:312016-10-19
- UTC
- 09:28:312016-10-19
Main parameters
| Date and time | 2016-10-19 09:28:31 UTC 2016-10-19 11:28:31 Belgian time |
|---|---|
| Magnitude | ML 1.5 |
| Epicentral coordinates | 50.725° N, 3.845° E Uncertainty ± 4.5 km |
| Depth of hypocenter | 2.8 ± 3.0 km |
| Event ID | ROB 5564 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2016-10-19 11:49:24 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
- 1.5 – 153.6km
- Mean velocity, P wave
- 5.7km/s
- Mean velocity, S wave
- 3.6km/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 2.8 km. P wave: 7 measurements, root-mean-square deviation 0.18 s. S wave: 4 measurements, root-mean-square deviation 0.45 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)8 stations | ||||||
| LESLessines | 1.5 | 185 | 09:28:31.53+0.51 s | 09:28:31.73+0.71 s | 0.20 | – |
| SKQSteenkerque | 18.6 | 117 | 09:28:34.19+3.17 s | 09:28:36.61+5.59 s | 2.42 | 68.2 |
| RQRRonquières | 29.9 | 116 | 09:28:36.01+4.99 s | – | – | – |
| BRQBracquegnies | 34.0 | 143 | 09:28:37.17+6.15 s | – | – | – |
| SNFSeneffe | 39.1 | 127 | 09:28:38.08+7.06 s | – | – | – |
| DOUDourbes | 88.0 | 142 | 09:28:46.80+15.78 s | 09:28:56.46+25.44 s | 9.66 | 7.4 |
| RCHRochefort | 116.9 | 122 | 09:28:51.55+20.53 s | 09:29:03.41+32.39 s | 11.86 | – |
| MEMSMembach | 153.6 | 94 | 09:28:55.73+24.71 s | – | – | – |