Mettlach (DE)
Quarry blast26 February 2020
- Magnitude
- 1.8ML
- Depth
- –
- Belgian time
- 12:46:332020-02-26
- UTC
- 11:46:332020-02-26
Main parameters
| Date and time | 2020-02-26 11:46:33 UTC 2020-02-26 12:46:33 Belgian time |
|---|---|
| Magnitude | ML 1.8 |
| Epicentral coordinates | 49.516° N, 6.623° E Uncertainty ± 5.4 km |
| Event ID | ROB 9340 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2020-02-26 14:03:18 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
- 9
- Epicentral distance
- 55.7 – 146.6km
- Mean velocity, P wave
- 5.8km/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: 4 measurements, root-mean-square deviation 0.14 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)9 stations | |||||
| VIAVianden | 55.7 | 327 | 11:46:42.58+9.23 s | 11:46:49.08+15.73 s | 6.50 |
| KLBKalborn | 74.8 | 331 | 11:46:45.94+12.59 s | 11:46:54.29+20.94 s | 8.35 |
| HOUHouvegnez | 103.3 | 335 | 11:46:50.59+17.24 s | – | – |
| MRGMont Rigi | 117.5 | 341 | 11:46:53.44+20.09 s | 11:47:07.68+34.33 s | 14.24 |
| RCHRochefort | 123.1 | 306 | 11:46:54.81+21.46 s | 11:47:09.67+36.32 s | 14.86 |
| MEMHMembach | 129.3 | 340 | 11:46:55.34+21.99 s | 11:47:11.31+37.96 s | 15.97 |
| MEMSMembach | 129.3 | 340 | 11:46:55.41+22.06 s | – | – |
| CLAClavier | 138.1 | 317 | 11:46:57.03+23.68 s | – | – |
| GESGesves | 146.6 | 312 | 11:46:58.61+25.26 s | – | – |