MALMEDY (BE)
Quarry blast6 September 2022
- Magnitude
- 0.9ML
- Depth
- –
- Belgian time
- 14:51:582022-09-06
- UTC
- 12:51:582022-09-06
Main parameters
| Date and time | 2022-09-06 12:51:58 UTC 2022-09-06 14:51:58 Belgian time |
|---|---|
| Magnitude | ML 0.9 |
| Epicentral coordinates | 50.438° N, 6.076° E Uncertainty ± 1.6 km |
| Event ID | ROB 17035 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2022-09-07 09:44:04 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
- 6
- Epicentral distance
- 8.1 – 37.7km
- Mean velocity, P wave
- 5.5km/s
- Mean velocity, S wave
- 3.3km/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: 6 measurements, root-mean-square deviation 0.14 s. S wave: 5 measurements, root-mean-square deviation 0.35 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 | |
|---|---|---|---|---|---|
| Belgian seismic network (Royal Observatory of Belgium)4 stations | |||||
| MRGMont Rigi | 8.1 | 360 | 12:52:00.34+1.52 s | 12:52:00.84+2.02 s | 0.50 |
| HOUHouvegnez | 10.6 | 208 | 12:52:01.04+2.22 s | 12:52:02.48+3.66 s | 1.44 |
| MEMSMembach | 19.6 | 346 | 12:52:02.50+3.68 s | 12:52:04.99+6.17 s | 2.49 |
| KLBKalborn | 37.6 | 176 | 12:52:06.02+7.20 s | 12:52:09.94+11.12 s | 3.92 |
| Bensberg seismic network (University of Cologne, Germany)1 station | |||||
| KLLKalltalsperre | 28.6 | 36 | 12:52:04.07+5.25 s | – | – |
| Dutch seismic network (KNMI)1 station | |||||
| HGNHeimansgroeve | 37.7 | 344 | 12:52:05.65+6.83 s | 12:52:10.52+11.70 s | 4.87 |