OLNE (BE)
Quarry blast9 August 2018
- Magnitude
- 1.4ML
- Depth
- –
- Belgian time
- 13:31:082018-08-09
- UTC
- 11:31:082018-08-09
Main parameters
| Date and time | 2018-08-09 11:31:08 UTC 2018-08-09 13:31:08 Belgian time |
|---|---|
| Magnitude | ML 1.4 |
| Epicentral coordinates | 50.593° N, 5.713° E Uncertainty ± 1.0 km |
| Event ID | ROB 7070 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2018-08-09 13:55:16 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
- 9.6 – 74.5km
- 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. Depth not determined: hypocenter placed at the surface for the calculation. P wave: 8 measurements, root-mean-square deviation 0.27 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 | |||||
| LCHLa Chartreuse | 9.6 | 302 | 11:31:10.37+1.47 s | – | – |
| MEMSMembach | 21.1 | 85 | 11:31:12.48+3.58 s | 11:31:15.70+6.80 s | 3.22 |
| MRGMont Rigi | 27.2 | 109 | 11:31:13.55+4.65 s | 11:31:17.10+8.20 s | 3.55 |
| HOUHouvegnez | 33.7 | 142 | 11:31:15.50+6.60 s | – | – |
| CLAClavier | 35.0 | 237 | 11:31:14.99+6.09 s | 11:31:19.57+10.67 s | 4.58 |
| GESGesves | 50.1 | 243 | 11:31:17.72+8.82 s | – | – |
| KLBKalborn | 61.6 | 153 | 11:31:19.78+10.88 s | – | – |
| MRDMaredsous | 74.5 | 245 | 11:31:21.85+12.95 s | – | – |
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