NOVILLE (BE)
Quarry blast25 May 2020
- Magnitude
- 1.6ML
- Depth
- 5.7km ± 4.1
- Belgian time
- 15:25:532020-05-25
- UTC
- 13:25:532020-05-25
Main parameters
| Date and time | 2020-05-25 13:25:53 UTC 2020-05-25 15:25:53 Belgian time |
|---|---|
| Magnitude | ML 1.6 |
| Epicentral coordinates | 50.028° N, 5.755° E Uncertainty ± 0.9 km |
| Depth of hypocenter | 5.7 ± 4.1 km |
| Event ID | ROB 10085 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2020-05-26 11:13:41 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
- 11
- Epicentral distance
- 26.6 – 137.9km
- Mean velocity, P wave
- 6.6km/s
- Mean velocity, S wave
- 3.6km/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. Hypocenter at a depth of 5.7 km. P wave: 9 measurements, root-mean-square deviation 0.90 s. S wave: 8 measurements, root-mean-square deviation 0.30 s.
Stations farther than 120 km are left out of the fit: the first waves to reach them have travelled beneath the crust, through the mantle, where they propagate faster.
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)11 stations | ||||||
| KLBKalborn | 26.6 | 72 | 13:25:57.45+4.37 s | 13:26:00.90+7.82 s | 3.45 | – |
| VIAVianden | 33.6 | 108 | 13:25:58.87+5.79 s | 13:26:03.24+10.16 s | 4.37 | – |
| RCHRochefort | 40.4 | 291 | – | 13:26:04.91+11.83 s | – | – |
| HOUHouvegnez | 40.5 | 26 | 13:26:00.12+7.04 s | 13:26:04.65+11.57 s | 4.53 | 30.6 |
| WLFWalferdange | 49.4 | 145 | 13:26:01.77+8.69 s | 13:26:07.41+14.33 s | 5.64 | – |
| CLAClavier | 54.3 | 324 | 13:26:02.63+9.55 s | – | – | – |
| MRGMont Rigi | 58.4 | 23 | 13:26:03.39+10.31 s | 13:26:10.10+17.02 s | 6.71 | – |
| GESGesves | 62.1 | 310 | 13:26:04.15+11.07 s | 13:26:11.57+18.49 s | 7.42 | – |
| TNLTernell | 67.6 | 23 | 13:26:04.93+11.85 s | – | – | – |
| MRDMaredsous | 76.9 | 294 | 13:26:03.33+10.25 s | 13:26:14.82+21.74 s | 11.49 | – |
| SKQSteenkerque | 137.9 | 301 | 13:26:16.47+23.39 s | 13:26:32.28+39.20 s | 15.81 | – |