MALMEDY (BE)
Quarry blast19 August 2022
- Magnitude
- 0.9ML
- Depth
- –
- Belgian time
- 11:59:222022-08-19
- UTC
- 09:59:222022-08-19
Main parameters
| Date and time | 2022-08-19 09:59:22 UTC 2022-08-19 11:59:22 Belgian time |
|---|---|
| Magnitude | ML 0.9 |
| Epicentral coordinates | 50.430° N, 6.045° E Uncertainty ± 1.5 km |
| Event ID | ROB 16880 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2022-08-19 13:17:35 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
- 8.9 – 68.3km
- Mean velocity, P wave
- 6.3km/s
- Mean velocity, S wave
- 3.4km/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 0.72 s. S wave: 4 measurements, root-mean-square deviation 0.28 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)5 stations | |||||
| HOUHouvegnez | 8.9 | 199 | 09:59:24.86+2.01 s | 09:59:25.55+2.70 s | 0.69 |
| MEMHMembach | 20.1 | 353 | 09:59:25.96+3.11 s | 09:59:29.60+6.75 s | 3.64 |
| KLBKalborn | 37.0 | 173 | 09:59:29.42+6.57 s | – | – |
| RCHRochefort | 65.8 | 243 | 09:59:32.37+9.52 s | – | – |
| GESGesves | 68.3 | 266 | 09:59:35.02+12.17 s | 09:59:43.42+20.57 s | 8.40 |
| Dutch seismic network (KNMI)1 station | |||||
| HGNHeimansgroeve | 38.0 | 348 | 09:59:29.70+6.85 s | 09:59:34.31+11.46 s | 4.61 |