ERDEN (DE)
Suspected quarry blast27 July 2017
- Magnitude
- 1.7ML
- Depth
- 8.3km ± 3.1
- Belgian time
- 10:55:152017-07-27
- UTC
- 08:55:152017-07-27
Main parameters
| Date and time | 2017-07-27 08:55:15 UTC 2017-07-27 10:55:15 Belgian time |
|---|---|
| Magnitude | ML 1.7 |
| Epicentral coordinates | 49.969° N, 7.026° E Uncertainty ± 2.8 km |
| Depth of hypocenter | 8.3 ± 3.1 km |
| Event ID | ROB 5800 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2017-07-27 11:35:37 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
- 10
- Epicentral distance
- 59.2 – 174.7km
- Mean velocity, P wave
- 6.0km/s
- Mean velocity, S wave
- 3.5km/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 8.3 km. P wave: 6 measurements, root-mean-square deviation 0.55 s. S wave: 5 measurements, root-mean-square deviation 0.27 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)10 stations | ||||||
| VIAVianden | 59.2 | 267 | 08:55:25.92+9.93 s | 08:55:33.55+17.56 s | 7.63 | 22.7 |
| KLBKalborn | 67.3 | 283 | 08:55:27.41+11.42 s | – | – | – |
| WLFWalferdange | 71.5 | 242 | 08:55:28.34+12.35 s | 08:55:36.77+20.78 s | 8.43 | – |
| HOUHouvegnez | 84.6 | 301 | 08:55:28.97+12.98 s | 08:55:40.24+24.25 s | 11.27 | – |
| MRGMont Rigi | 90.7 | 312 | 08:55:31.66+15.67 s | 08:55:42.01+26.02 s | 10.35 | – |
| MEMHMembach | 101.5 | 315 | 08:55:33.19+17.20 s | 08:55:45.74+29.75 s | 12.55 | – |
| LCHLa Chartreuse | 126.0 | 307 | 08:55:19.51+3.52 s | – | – | – |
| CLAClavier | 132.9 | 293 | 08:55:38.73+22.74 s | 08:55:54.35+38.36 s | 15.62 | – |
| GESGesves | 146.0 | 289 | 08:55:40.43+24.44 s | 08:55:57.27+41.28 s | 16.84 | – |
| DOUDourbes | 174.7 | 276 | 08:55:44.35+28.36 s | 08:56:04.18+48.19 s | 19.83 | – |