ROCHEFORT (BE)
Quarry blast9 September 2020
- Magnitude
- 1.6ML
- Depth
- –
- Belgian time
- 12:26:442020-09-09
- UTC
- 10:26:442020-09-09
Main parameters
| Date and time | 2020-09-09 10:26:44 UTC 2020-09-09 12:26:44 Belgian time |
|---|---|
| Magnitude | ML 1.6 |
| Epicentral coordinates | 50.096° N, 5.149° E Uncertainty ± 2.0 km |
| Event ID | ROB 10830 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2020-09-09 14:53:58 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
- 11
- Epicentral distance
- 8.6 – 97.9km
- Mean velocity, P wave
- 5.4km/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: 11 measurements, root-mean-square deviation 0.25 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)11 stations | |||||
| RCHRochefort | 8.6 | 40 | 10:26:45.25+1.04 s | – | – |
| GESGesves | 32.5 | 352 | 10:26:49.83+5.62 s | 10:26:54.18+9.97 s | 4.35 |
| MRDMaredsous | 35.6 | 310 | 10:26:50.44+6.23 s | 10:26:55.19+10.98 s | 4.75 |
| CLAClavier | 37.6 | 17 | 10:26:50.40+6.19 s | 10:26:56.02+11.81 s | 5.62 |
| DOUDourbes | 39.7 | 270 | 10:26:50.93+6.72 s | 10:26:56.24+12.03 s | 5.31 |
| HOUHouvegnez | 67.5 | 64 | 10:26:55.78+11.57 s | – | – |
| LCHLa Chartreuse | 68.4 | 28 | 10:26:56.19+11.98 s | – | – |
| KLBKalborn | 68.7 | 89 | 10:26:55.86+11.65 s | – | – |
| MEMHMembach | 83.7 | 47 | 10:26:59.38+15.17 s | – | – |
| MEMSMembach | 83.7 | 47 | 10:26:59.40+15.19 s | – | – |
| SKQSteenkerque | 97.9 | 309 | 10:27:02.02+17.81 s | – | – |
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