LESSINES (BE)
Quarry blast30 August 2018
- Magnitude
- 1.8ML
- Depth
- –
- Belgian time
- 15:31:252018-08-30
- UTC
- 13:31:252018-08-30
Main parameters
| Date and time | 2018-08-30 13:31:25 UTC 2018-08-30 15:31:25 Belgian time |
|---|---|
| Magnitude | ML 1.8 |
| Epicentral coordinates | 50.729° N, 3.793° E Uncertainty ± 5.0 km |
| Event ID | ROB 7150 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2018-08-30 16:36:40 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
- 4.0 – 112.3km
- Mean velocity, P wave
- 5.4km/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 0.43 s.
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 | |
|---|---|---|---|---|---|
| Belgian seismic network (Royal Observatory of Belgium)6 stations | |||||
| LESLessines | 4.0 | 119 | 13:31:25.95+0.47 s | 13:31:26.11+0.63 s | 0.16 |
| SKQSteenkerque | 22.1 | 114 | 13:31:28.66+3.18 s | – | – |
| RQRRonquières | 33.4 | 114 | 13:31:30.59+5.11 s | – | – |
| MRDMaredsous | 83.9 | 124 | 13:31:40.22+14.74 s | – | – |
| GESGesves | 99.3 | 112 | 13:31:44.01+18.53 s | – | – |
| CLAClavier | 112.3 | 107 | 13:31:45.30+19.82 s | 13:32:00.15+34.67 s | 14.85 |
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