NORTH SEA (BE)
Controlled explosion5 September 2017
- Magnitude
- 1.6ML
- Depth
- 7.9km ± 5.0
- Belgian time
- 17:52:252017-09-05
- UTC
- 15:52:252017-09-05
Main parameters
| Date and time | 2017-09-05 15:52:25 UTC 2017-09-05 17:52:25 Belgian time |
|---|---|
| Magnitude | ML 1.6 |
| Epicentral coordinates | 51.336° N, 3.046° E Uncertainty ± 3.9 km |
| Depth of hypocenter | 7.9 ± 5.0 km |
| Event ID | ROB 5875 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2017-09-06 09:27:51 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
- 12
- Epicentral distance
- 24.4 – 256.3km
- Mean velocity, P wave
- 5.6km/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 7.9 km. P wave: 4 measurements, root-mean-square deviation 0.10 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)12 stations | ||||||
| ZEVZevekote | 24.4 | 205 | 15:52:29.14+3.54 s | 15:52:33.75+8.15 s | 4.61 | – |
| LESLessines | 89.2 | 141 | 15:52:40.78+15.18 s | 15:52:51.23+25.63 s | 10.45 | – |
| SKQSteenkerque | 105.4 | 136 | 15:52:43.49+17.89 s | 15:52:55.75+30.15 s | 12.26 | – |
| RQRRonquières | 116.0 | 134 | 15:52:45.27+19.67 s | – | – | – |
| BRQBracquegnies | 122.2 | 141 | 15:52:46.52+20.92 s | – | – | – |
| BOUBougnies | 122.9 | 149 | 15:52:44.77+19.17 s | – | – | – |
| DSLBDessel | 141.3 | 94 | 15:52:48.96+23.36 s | 15:53:06.25+40.65 s | 17.29 | – |
| DOUDourbes | 176.1 | 141 | 15:52:53.93+28.33 s | 15:53:16.80+51.20 s | 22.87 | – |
| GESGesves | 178.4 | 126 | 15:52:54.38+28.78 s | 15:53:15.61+50.01 s | 21.23 | – |
| CLAClavier | 188.7 | 122 | 15:52:56.39+30.79 s | 15:53:17.56+51.96 s | 21.17 | 4.8 |
| MEMHMembach | 223.3 | 110 | 15:52:59.84+34.24 s | – | – | – |
| KLBKalborn | 256.3 | 121 | 15:53:04.12+38.52 s | – | – | – |