LESSINES (BE)
Known mine explosion30 March 2016
- Magnitude
- 1.8ML
- Depth
- –
- Belgian time
- 11:18:342016-03-30
- UTC
- 09:18:342016-03-30
Main parameters
| Date and time | 2016-03-30 09:18:34 UTC 2016-03-30 11:18:34 Belgian time |
|---|---|
| Magnitude | ML 1.8 |
| Epicentral coordinates | 50.711° N, 3.844° E Uncertainty ± 5.3 km |
| Event ID | ROB 5471 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2016-03-30 11:55:42 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
- 6
- Epicentral distance
- 0.1 – 153.5km
- Mean velocity, P wave
- 6.2km/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: 5 measurements, root-mean-square deviation 0.09 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)6 stations | ||||||
| LESLessines | 0.1 | 270 | 09:18:34.50+0.44 s | – | – | – |
| SKQSteenkerque | 18.0 | 112 | 09:18:37.19+3.13 s | 09:18:39.74+5.68 s | 2.55 | – |
| RQRRonquières | 29.3 | 113 | 09:18:39.25+5.19 s | – | – | – |
| BRQBracquegnies | 32.9 | 141 | 09:18:39.65+5.59 s | – | – | – |
| SNFSeneffe | 38.3 | 125 | 09:18:40.64+6.58 s | – | – | – |
| MEMSMembach | 153.5 | 93 | 09:19:00.16+26.10 s | 09:19:18.85+44.79 s | 18.69 | 11.8 |