PURNODE (BE)
Quarry blast19 July 2018
- Magnitude
- 1.1ML
- Depth
- 10.0km ± 19.3
- Belgian time
- 14:09:002018-07-19
- UTC
- 12:09:002018-07-19
Main parameters
| Date and time | 2018-07-19 12:09:00 UTC 2018-07-19 14:09:00 Belgian time |
|---|---|
| Magnitude | ML 1.1 |
| Epicentral coordinates | 50.304° N, 4.943° E Uncertainty ± 11.5 km |
| Depth of hypocenter | 10.0 ± 19.3 km |
| Event ID | ROB 6990 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2018-07-20 10:48:22 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
- 5
- Epicentral distance
- 12.5 – 83.0km
- Mean velocity, P wave
- 8.5km/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. Hypocenter at a depth of 10.0 km. P wave: 5 measurements, root-mean-square deviation 0.93 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 | nm | |
|---|---|---|---|---|---|---|
| Belgian seismic network (Royal Observatory of Belgium)5 stations | ||||||
| MRDMaredsous | 12.5 | 269 | 12:09:02.20+1.83 s | 12:09:03.84+3.47 s | 1.64 | – |
| RCHRochefort | 26.2 | 129 | 12:09:05.10+4.73 s | – | – | – |
| CLAClavier | 28.5 | 63 | 12:09:06.23+5.86 s | 12:09:10.62+10.25 s | 4.39 | 11.2 |
| DOUDourbes | 34.1 | 227 | 12:09:07.04+6.67 s | 12:09:11.68+11.31 s | 4.64 | – |
| MEMHMembach | 83.0 | 65 | 12:09:11.12+10.75 s | – | – | – |
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