HAMOIR (BE)
Quarry blast13 July 2021
- Magnitude
- 1.1ML
- Depth
- –
- Belgian time
- 15:08:082021-07-13
- UTC
- 13:08:082021-07-13
Main parameters
| Date and time | 2021-07-13 13:08:08 UTC 2021-07-13 15:08:08 Belgian time |
|---|---|
| Magnitude | ML 1.1 |
| Epicentral coordinates | 50.460° N, 5.583° E Uncertainty ± 0.8 km |
| Event ID | ROB 14005 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2021-07-26 11:59:32 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
- 20.0 – 54.8km
- Mean velocity, P wave
- 6.2km/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: 9 measurements, root-mean-square deviation 0.26 s. S wave: 8 measurements, root-mean-square deviation 0.33 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)8 stations | |||||
| LCHLa Chartreuse | 20.0 | 3 | 13:08:12.30+3.67 s | 13:08:15.38+6.75 s | 3.08 |
| CLAClavier | 20.5 | 257 | 13:08:12.02+3.39 s | 13:08:15.21+6.58 s | 3.19 |
| MEMHMembach | 34.5 | 61 | 13:08:14.60+5.97 s | 13:08:19.26+10.63 s | 4.66 |
| MEMSMembach | 34.5 | 61 | 13:08:14.74+6.11 s | 13:08:19.17+10.54 s | 4.43 |
| MRGMont Rigi | 35.3 | 81 | 13:08:14.95+6.32 s | 13:08:19.40+10.77 s | 4.45 |
| GESGesves | 36.3 | 257 | 13:08:15.26+6.63 s | 13:08:20.25+11.62 s | 4.99 |
| TNLTernell | 41.2 | 70 | 13:08:16.04+7.41 s | – | – |
| KLBKalborn | 54.8 | 137 | 13:08:17.45+8.82 s | 13:08:25.86+17.23 s | 8.41 |
| Dutch seismic network (KNMI)1 station | |||||
| HGNHeimansgroeve | 41.9 | 36 | 13:08:15.98+7.35 s | 13:08:20.98+12.35 s | 5.00 |