COMBLAIN-AU-PONT (BE)
Quarry blast23 June 2021
- Magnitude
- 1.2ML
- Depth
- –
- Belgian time
- 15:01:242021-06-23
- UTC
- 13:01:242021-06-23
Main parameters
| Date and time | 2021-06-23 13:01:24 UTC 2021-06-23 15:01:24 Belgian time |
|---|---|
| Magnitude | ML 1.2 |
| Epicentral coordinates | 50.481° N, 5.601° E Uncertainty ± 2.4 km |
| Event ID | ROB 13780 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2021-06-28 11:10:19 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
- 7
- Epicentral distance
- 17.5 – 55.8km
- Mean velocity, P wave
- 6.1km/s
- Mean velocity, S wave
- 3.5km/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: 7 measurements, root-mean-square deviation 0.27 s. S wave: 7 measurements, root-mean-square deviation 0.18 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)7 stations | |||||
| LCHLa Chartreuse | 17.5 | 360 | 13:01:28.13+3.19 s | 13:01:30.86+5.92 s | 2.73 |
| CLAClavier | 22.3 | 252 | 13:01:28.89+3.95 s | 13:01:31.92+6.98 s | 3.03 |
| HOUHouvegnez | 32.1 | 116 | 13:01:30.47+5.53 s | 13:01:34.68+9.74 s | 4.21 |
| MEMHMembach | 32.3 | 64 | 13:01:30.98+6.04 s | 13:01:34.78+9.84 s | 3.80 |
| MEMSMembach | 32.3 | 64 | 13:01:31.00+6.06 s | 13:01:34.79+9.85 s | 3.79 |
| MRGMont Rigi | 33.8 | 84 | 13:01:30.54+5.60 s | 13:01:34.91+9.97 s | 4.37 |
| KLBKalborn | 55.8 | 139 | 13:01:34.80+9.86 s | 13:01:41.38+16.44 s | 6.58 |