MALMEDY (BE)
Quarry blast31 March 2022
- Magnitude
- 0.5ML
- Depth
- –
- Belgian time
- 14:47:552022-03-31
- UTC
- 12:47:552022-03-31
Main parameters
| Date and time | 2022-03-31 12:47:55 UTC 2022-03-31 14:47:55 Belgian time |
|---|---|
| Magnitude | ML 0.5 |
| Epicentral coordinates | 50.445° N, 6.050° E Uncertainty ± 1.6 km |
| Event ID | ROB 15850 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2022-04-06 09:33:05 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
- 5
- Epicentral distance
- 7.5 – 38.6km
- Mean velocity, P wave
- 5.4km/s
- Mean velocity, S wave
- 3.0km/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: 5 measurements, root-mean-square deviation 0.06 s. S wave: 4 measurements, root-mean-square deviation 0.17 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 | |||||
| MRGMont Rigi | 7.5 | 13 | 12:47:56.75+1.36 s | 12:47:57.90+2.51 s | 1.15 |
| HOUHouvegnez | 10.7 | 198 | 12:47:57.38+1.99 s | 12:47:58.88+3.49 s | 1.50 |
| TNLTernell | 16.6 | 20 | 12:47:58.35+2.96 s | 12:48:00.64+5.25 s | 2.29 |
| MEMSMembach | 18.4 | 351 | 12:47:58.86+3.47 s | 12:48:01.71+6.32 s | 2.85 |
| KLBKalborn | 38.6 | 174 | 12:48:02.50+7.11 s | – | – |