NORTH SEA (BE)
Controlled explosion31 October 2019
- Magnitude
- 1.9ML
- Depth
- 4.4km ± 3.1
- Belgian time
- 13:54:102019-10-31
- UTC
- 12:54:102019-10-31
Main parameters
| Date and time | 2019-10-31 12:54:10 UTC 2019-10-31 13:54:10 Belgian time |
|---|---|
| Magnitude | ML 1.9 |
| Epicentral coordinates | 51.470° N, 3.182° E Uncertainty ± 2.0 km |
| Depth of hypocenter | 4.4 ± 3.1 km |
| Event ID | ROB 8805 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2019-10-31 14:28:39 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
- 19
- Epicentral distance
- 30.8 – 256.6km
- Mean velocity, P wave
- 5.7km/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 4.4 km. P wave: 4 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 | nm | |
|---|---|---|---|---|---|---|
| Belgian seismic network (Royal Observatory of Belgium)19 stations | ||||||
| OSTBOostende | 30.8 | 213 | 12:54:15.46+4.97 s | 12:54:19.62+9.13 s | 4.16 | – |
| LESLessines | 96.3 | 151 | 12:54:26.88+16.39 s | 12:54:37.83+27.34 s | 10.95 | – |
| SKQSteenkerque | 110.9 | 145 | 12:54:29.27+18.78 s | 12:54:42.74+32.25 s | 13.47 | – |
| UCCBUccle | 111.4 | 132 | 12:54:29.57+19.08 s | – | – | – |
| RQRRonquières | 120.8 | 142 | 12:54:30.96+20.47 s | – | – | – |
| BRQBracquegnies | 128.8 | 148 | 12:54:32.47+21.98 s | – | – | – |
| BOUBougnies | 131.7 | 156 | 12:54:33.24+22.75 s | – | – | – |
| TGATangissart | 134.5 | 135 | 12:54:33.15+22.66 s | – | – | – |
| MOLTMol | 135.7 | 101 | 12:54:33.16+22.67 s | 12:54:48.57+38.08 s | 15.41 | – |
| MRDMaredsous | 171.3 | 139 | 12:54:38.93+28.44 s | – | – | – |
| OPTBOpitter | 175.8 | 102 | 12:54:38.60+28.11 s | – | – | – |
| GESGesves | 180.3 | 131 | 12:54:39.02+28.53 s | – | – | – |
| DOUDourbes | 182.6 | 146 | 12:54:40.75+30.26 s | 12:55:01.14+50.65 s | 20.39 | – |
| CLAClavier | 189.4 | 127 | 12:54:40.24+29.75 s | 12:55:02.88+52.39 s | 22.64 | 10.5 |
| STISart Tilman | 194.1 | 120 | 12:54:41.00+30.51 s | – | – | – |
| RCHRochefort | 205.4 | 135 | 12:54:42.60+32.11 s | – | – | – |
| MRGMont Rigi | 229.4 | 117 | 12:54:45.08+34.59 s | – | – | – |
| HOUHouvegnez | 234.2 | 121 | 12:54:46.22+35.73 s | – | – | – |
| KLBKalborn | 256.6 | 125 | 12:54:47.68+37.19 s | – | – | – |