CHAUDFONTAINE (BE)
Quarry blast21 May 2021
- Magnitude
- 1.2ML
- Depth
- –
- Belgian time
- 14:27:072021-05-21
- UTC
- 12:27:072021-05-21
Main parameters
| Date and time | 2021-05-21 12:27:07 UTC 2021-05-21 14:27:07 Belgian time |
|---|---|
| Magnitude | ML 1.2 |
| Epicentral coordinates | 50.612° N, 5.638° E Uncertainty ± 2.7 km |
| Event ID | ROB 13510 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2021-05-25 09:24:14 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
- 10
- Epicentral distance
- 4.1 – 93.9km
- 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: 10 measurements, root-mean-square deviation 0.67 s. S wave: 7 measurements, root-mean-square deviation 0.88 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)9 stations | |||||
| LCHLa Chartreuse | 4.1 | 318 | 12:27:07.78+0.62 s | – | – |
| MEMHMembach | 26.3 | 91 | 12:27:11.94+4.78 s | 12:27:14.86+7.70 s | 2.92 |
| MEMSMembach | 26.3 | 91 | 12:27:12.05+4.89 s | – | – |
| CLAClavier | 32.1 | 228 | 12:27:13.68+6.52 s | – | – |
| MRGMont Rigi | 32.9 | 110 | 12:27:12.76+5.60 s | 12:27:16.83+9.67 s | 4.07 |
| TNLTernell | 34.9 | 95 | 12:27:12.34+5.18 s | 12:27:17.72+10.56 s | 5.38 |
| HOUHouvegnez | 38.7 | 138 | 12:27:14.57+7.41 s | 12:27:18.22+11.06 s | 3.65 |
| KLBKalborn | 66.0 | 149 | 12:27:18.80+11.64 s | 12:27:25.72+18.56 s | 6.92 |
| DOUDourbes | 93.9 | 233 | 12:27:21.86+14.70 s | 12:27:36.14+28.98 s | 14.28 |
| Dutch seismic network (KNMI)1 station | |||||
| HGNHeimansgroeve | 26.8 | 51 | 12:27:12.96+5.80 s | 12:27:16.79+9.63 s | 3.83 |