PETIT-ROEULX-LEZ-BRAINE (BE)
Quarry blast8 August 2019
- Magnitude
- 1.0ML
- Depth
- 9.8km ± 5.4
- Belgian time
- 14:09:522019-08-08
- UTC
- 12:09:522019-08-08
Main parameters
| Date and time | 2019-08-08 12:09:52 UTC 2019-08-08 14:09:52 Belgian time |
|---|---|
| Magnitude | ML 1.0 |
| Epicentral coordinates | 50.613° N, 4.074° E Uncertainty ± 5.9 km |
| Depth of hypocenter | 9.8 ± 5.4 km |
| Event ID | ROB 8460 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2019-08-08 14:28:07 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
- 4
- Epicentral distance
- 4.0 – 68.5km
- 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. Hypocenter at a depth of 9.8 km. P wave: 4 measurements, root-mean-square deviation 0.32 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)4 stations | ||||||
| SKQSteenkerque | 4.0 | 6 | 12:09:53.98+1.84 s | 12:09:55.34+3.20 s | 1.36 | 23.7 |
| RQRRonquières | 10.7 | 94 | 12:09:54.65+2.51 s | 12:09:56.52+4.38 s | 1.87 | – |
| BRQBracquegnies | 15.4 | 163 | 12:09:54.57+2.43 s | – | – | – |
| DOUDourbes | 68.5 | 147 | 12:10:04.40+12.26 s | – | – | – |
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