LONTZEN (BE)
Quarry blast8 March 2021
- Magnitude
- 1.1ML
- Depth
- –
- Belgian time
- 12:59:362021-03-08
- UTC
- 11:59:362021-03-08
Main parameters
| Date and time | 2021-03-08 11:59:36 UTC 2021-03-08 12:59:36 Belgian time |
|---|---|
| Magnitude | ML 1.1 |
| Epicentral coordinates | 50.670° N, 6.037° E Uncertainty ± 1.7 km |
| Event ID | ROB 12730 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2021-03-09 18:25:38 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
- 7.0 – 35.2km
- Mean velocity, P wave
- 6.0km/s
- Mean velocity, S wave
- 3.2km/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 0.23 s. S wave: 5 measurements, root-mean-square deviation 0.26 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 | |||||
| MEMHMembach | 7.0 | 196 | 11:59:37.22+1.22 s | 11:59:38.55+2.55 s | 1.33 |
| TNLTernell | 11.4 | 145 | 11:59:38.16+2.16 s | 11:59:40.02+4.02 s | 1.86 |
| MRGMont Rigi | 17.9 | 171 | 11:59:39.37+3.37 s | 11:59:42.21+6.21 s | 2.84 |
| HOUHouvegnez | 35.2 | 184 | 11:59:42.40+6.40 s | 11:59:47.09+11.09 s | 4.69 |
| Dutch seismic network (KNMI)1 station | |||||
| HGNHeimansgroeve | 12.9 | 325 | 11:59:38.10+2.10 s | 11:59:40.75+4.75 s | 2.65 |