NORTH SEA
Controlled explosion26 June 2019
- Magnitude
- 1.5ML
- Depth
- –
- Belgian time
- 14:31:022019-06-26
- UTC
- 12:31:022019-06-26
Main parameters
| Date and time | 2019-06-26 12:31:02 UTC 2019-06-26 14:31:02 Belgian time |
|---|---|
| Magnitude | ML 1.5 |
| Epicentral coordinates | 51.445° N, 3.228° E Uncertainty ± 3.3 km |
| Event ID | ROB 8295 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2019-06-28 10:01:04 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
- 16
- Epicentral distance
- 30.6 – 190.1km
- Mean velocity, P wave
- 6.1km/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: 6 measurements, root-mean-square deviation 0.21 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)14 stations | ||||||
| OSTBOostende | 30.6 | 221 | 12:31:08.67+5.96 s | 12:31:11.39+8.68 s | 2.72 | 23.4 |
| ZEVZevekote | 41.2 | 214 | 12:31:09.96+7.25 s | – | – | – |
| LESLessines | 92.3 | 152 | 12:31:18.90+16.19 s | – | – | – |
| SKQSteenkerque | 106.8 | 146 | 12:31:20.87+18.16 s | – | – | – |
| UCCBUccle | 107.1 | 132 | 12:31:21.10+18.39 s | – | – | – |
| RQRRonquières | 116.6 | 143 | 12:31:22.34+19.63 s | 12:31:36.28+33.57 s | 13.94 | 10.2 |
| BRQBracquegnies | 124.7 | 149 | 12:31:24.32+21.61 s | – | – | – |
| BOUBougnies | 127.8 | 156 | 12:31:25.16+22.45 s | – | – | – |
| DSLSDessel | 130.2 | 100 | 12:31:22.04+19.33 s | – | – | – |
| MRDMaredsous | 167.1 | 139 | 12:31:30.74+28.03 s | – | – | – |
| GESGesves | 176.0 | 131 | 12:31:30.48+27.77 s | 12:31:53.67+50.96 s | 23.19 | 4.4 |
| DOUDourbes | 178.4 | 147 | 12:31:30.80+28.09 s | 12:31:53.65+50.94 s | 22.85 | – |
| CLAClavier | 185.1 | 127 | 12:31:31.53+28.82 s | – | – | – |
| LCHLa Chartreuse | 188.9 | 117 | 12:31:32.86+30.15 s | – | – | – |
| Dutch seismic network (KNMI)1 station | ||||||
| VKBValkenburg | 190.1 | 109 | 12:31:33.05+30.34 s | – | – | – |
| VITO (Mol)1 station | ||||||
| MOL2AMol | 132* | – | 12:31:26.01+23.30 s | – | – | – |
* Distance from the catalogue, rounded to the kilometre: the coordinates of the station are missing from it.