COMBLAIN-AU-PONT (BE)
Quarry blast28 September 2021
- Magnitude
- 1.1ML
- Depth
- –
- Belgian time
- 16:59:522021-09-28
- UTC
- 14:59:522021-09-28
Main parameters
| Date and time | 2021-09-28 14:59:52 UTC 2021-09-28 16:59:52 Belgian time |
|---|---|
| Magnitude | ML 1.1 |
| Epicentral coordinates | 50.488° N, 5.573° E Uncertainty ± 1.3 km |
| Event ID | ROB 14500 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2021-09-29 14:04:46 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
- 8
- Epicentral distance
- 20.7 – 41.0km
- Mean velocity, P wave
- 5.5km/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: 8 measurements, root-mean-square deviation 0.20 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 | |||||
| CLAClavier | 20.7 | 248 | 14:59:55.82+3.50 s | – | – |
| MEMSMembach | 33.8 | 66 | 14:59:58.23+5.91 s | 15:00:02.91+10.59 s | 4.68 |
| MEMHMembach | 33.8 | 66 | 14:59:58.25+5.93 s | 15:00:02.84+10.52 s | 4.59 |
| HOUHouvegnez | 34.1 | 116 | 14:59:58.73+6.41 s | – | – |
| MRGMont Rigi | 35.7 | 86 | 14:59:58.65+6.33 s | – | – |
| GESGesves | 36.4 | 252 | 14:59:58.85+6.53 s | 15:00:03.84+11.52 s | 4.99 |
| TNLTernell | 41.0 | 74 | 14:59:59.23+6.91 s | – | – |
| Dutch seismic network (KNMI)1 station | |||||
| HGNHeimansgroeve | 39.8 | 39 | 14:59:59.55+7.23 s | 15:00:04.44+12.12 s | 4.89 |
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