LA ROCHE-EN-ARDENNE (BE)
Quarry blast3 July 2018
- Magnitude
- 1.8ML
- Depth
- 10.2km ± 4.3
- Belgian time
- 16:52:312018-07-03
- UTC
- 14:52:312018-07-03
Main parameters
| Date and time | 2018-07-03 14:52:31 UTC 2018-07-03 16:52:31 Belgian time |
|---|---|
| Magnitude | ML 1.8 |
| Epicentral coordinates | 50.188° N, 5.592° E Uncertainty ± 1.0 km |
| Depth of hypocenter | 10.2 ± 4.3 km |
| Event ID | ROB 6835 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2018-07-04 13:46:21 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
- 12
- Epicentral distance
- 26.3 – 119.1km
- Mean velocity, P wave
- 5.9km/s
- Mean velocity, S wave
- 3.4km/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. Hypocenter at a depth of 10.2 km. P wave: 12 measurements, root-mean-square deviation 0.30 s. S wave: 5 measurements, root-mean-square deviation 0.08 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)12 stations | ||||||
| RCHRochefort | 26.3 | 262 | 14:52:36.48+4.57 s | – | – | – |
| CLAClavier | 33.0 | 321 | 14:52:37.47+5.56 s | 14:52:41.98+10.07 s | 4.51 | 48.0 |
| HOUHouvegnez | 34.8 | 58 | 14:52:37.59+5.68 s | – | – | – |
| KLBKalborn | 38.2 | 105 | 14:52:38.63+6.72 s | 14:52:43.69+11.78 s | 5.06 | – |
| GESGesves | 42.1 | 302 | 14:52:39.20+7.29 s | 14:52:44.78+12.87 s | 5.58 | – |
| MRGMont Rigi | 49.8 | 44 | 14:52:40.27+8.36 s | – | – | – |
| MEMHMembach | 55.5 | 32 | 14:52:41.51+9.60 s | 14:52:48.58+16.67 s | 7.07 | – |
| TNLTernell | 58.6 | 41 | 14:52:41.85+9.94 s | – | – | – |
| MRDMaredsous | 60.1 | 283 | 14:52:42.08+10.17 s | 14:52:49.85+17.94 s | 7.77 | – |
| WLFWalferdange | 70.8 | 145 | 14:52:44.70+12.79 s | – | – | – |
| DOUDourbes | 72.0 | 262 | 14:52:44.01+12.10 s | – | – | – |
| SKQSteenkerque | 119.1 | 296 | 14:52:51.59+19.68 s | – | – | – |
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