WALSDORF (DE)
Quarry blast27 February 2019
- Magnitude
- 2.2ML
- Depth
- –
- Belgian time
- 12:56:262019-02-27
- UTC
- 11:56:262019-02-27
Main parameters
| Date and time | 2019-02-27 11:56:26 UTC 2019-02-27 12:56:26 Belgian time |
|---|---|
| Magnitude | ML 2.2 |
| Epicentral coordinates | 50.268° N, 6.718° E Uncertainty ± 3.6 km |
| Event ID | ROB 7905 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2019-02-27 13:02:24 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
- 47.3 – 139.0km
- Mean velocity, P wave
- 5.5km/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. Depth not determined: hypocenter placed at the surface for the calculation. P wave: 10 measurements, root-mean-square deviation 0.18 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 | |
|---|---|---|---|---|---|
| Belgian seismic network (Royal Observatory of Belgium)10 stations | |||||
| KLBKalborn | 47.3 | 247 | 11:56:34.22+7.70 s | 11:56:40.42+13.90 s | 6.20 |
| HOUHouvegnez | 51.7 | 281 | 11:56:34.96+8.44 s | – | – |
| VIAVianden | 52.3 | 225 | 11:56:35.52+9.00 s | – | – |
| MRGMont Rigi | 53.1 | 301 | 11:56:35.37+8.85 s | 11:56:42.17+15.65 s | 6.80 |
| MEMHMembach | 63.0 | 307 | 11:56:36.90+10.38 s | 11:56:45.26+18.74 s | 8.36 |
| MEMSMembach | 63.0 | 307 | 11:56:36.97+10.45 s | – | – |
| WLFWalferdange | 78.5 | 211 | 11:56:40.08+13.56 s | – | – |
| CLAClavier | 102.2 | 280 | 11:56:44.44+17.92 s | – | – |
| RCHRochefort | 107.1 | 264 | 11:56:44.90+18.38 s | – | – |
| MRDMaredsous | 139.0 | 272 | 11:56:49.59+23.07 s | – | – |
| Dutch seismic network (KNMI)1 station | |||||
| HGNHeimansgroeve | 78.4 | 315 | 11:56:39.78+13.26 s | – | – |