GELBRESSEE (BE)
Quarry blast26 July 2018
- Magnitude
- 1.2ML
- Depth
- 1.6km ± 8.3
- Belgian time
- 13:46:472018-07-26
- UTC
- 11:46:472018-07-26
Main parameters
| Date and time | 2018-07-26 11:46:47 UTC 2018-07-26 13:46:47 Belgian time |
|---|---|
| Magnitude | ML 1.2 |
| Epicentral coordinates | 50.502° N, 4.957° E Uncertainty ± 2.6 km |
| Depth of hypocenter | 1.6 ± 8.3 km |
| Event ID | ROB 7040 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2018-07-27 11:09:55 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
- 16.0 – 93.5km
- Mean velocity, P wave
- 5.4km/s
- Mean velocity, S wave
- 3.1km/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 1.6 km. P wave: 8 measurements, root-mean-square deviation 0.42 s. S wave: 5 measurements, root-mean-square deviation 0.92 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 | nm | |
|---|---|---|---|---|---|---|
| Belgian seismic network (Royal Observatory of Belgium)8 stations | ||||||
| GESGesves | 16.0 | 145 | 11:46:50.13+2.43 s | – | – | – |
| CLAClavier | 26.2 | 111 | 11:46:52.07+4.37 s | 11:46:55.54+7.84 s | 3.47 | 16.5 |
| RCHRochefort | 43.2 | 153 | 11:46:54.30+6.60 s | 11:46:59.76+12.06 s | 5.46 | – |
| DOUDourbes | 52.1 | 210 | 11:46:57.21+9.51 s | 11:47:03.95+16.25 s | 6.74 | – |
| RQRRonquières | 53.1 | 283 | 11:46:56.98+9.28 s | – | – | – |
| SKQSteenkerque | 64.2 | 285 | 11:46:58.21+10.51 s | – | – | – |
| MEMHMembach | 75.6 | 81 | 11:47:01.17+13.47 s | 11:47:09.58+21.88 s | 8.41 | – |
| KLBKalborn | 93.5 | 118 | 11:47:04.08+16.38 s | 11:47:17.77+30.07 s | 13.69 | – |
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