LESSINES (BE)
Quarry blast26 September 2019
- Magnitude
- 1.7ML
- Depth
- –
- Belgian time
- 13:08:262019-09-26
- UTC
- 11:08:262019-09-26
Main parameters
| Date and time | 2019-09-26 11:08:26 UTC 2019-09-26 13:08:26 Belgian time |
|---|---|
| Magnitude | ML 1.7 |
| Epicentral coordinates | 50.725° N, 3.824° E Uncertainty ± 2.0 km |
| Event ID | ROB 8695 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2019-09-26 13:17:35 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
- 8
- Epicentral distance
- 2.1 – 51.1km
- 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. Depth not determined: hypocenter placed at the surface for the calculation. P wave: 8 measurements, root-mean-square deviation 0.65 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)8 stations | |||||
| LESLessines | 2.1 | 138 | 11:08:26.77−0.21 s | – | – |
| SKQSteenkerque | 20.0 | 115 | 11:08:29.46+2.48 s | – | – |
| RQRRonquières | 31.3 | 115 | 11:08:31.38+4.40 s | – | – |
| BRQBracquegnies | 35.0 | 141 | 11:08:32.56+5.58 s | – | – |
| BOUBougnies | 38.3 | 167 | 11:08:33.89+6.91 s | – | – |
| UCCBUccle | 38.7 | 78 | 11:08:33.97+6.99 s | – | – |
| UCCSUccle | 38.7 | 78 | 11:08:34.25+7.27 s | – | – |
| TGATangissart | 51.1 | 105 | 11:08:34.55+7.57 s | 11:08:39.82+12.84 s | 5.27 |
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