BRAINE-LE-COMTE (BE)
Quarry blast12 September 2019
- Magnitude
- 0.9ML
- Depth
- 2.0km ± 21.1
- Belgian time
- 14:03:322019-09-12
- UTC
- 12:03:322019-09-12
Main parameters
| Date and time | 2019-09-12 12:03:32 UTC 2019-09-12 14:03:32 Belgian time |
|---|---|
| Magnitude | ML 0.9 |
| Epicentral coordinates | 50.607° N, 4.119° E Uncertainty ± 4.5 km |
| Depth of hypocenter | 2.0 ± 21.1 km |
| Event ID | ROB 8645 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2019-09-13 07:55:18 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
- 5.4 – 27.2km
- Mean velocity, P wave
- 7.5km/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 2.0 km. P wave: 4 measurements, root-mean-square deviation 0.41 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 | ||||||
| SKQSteenkerque | 5.4 | 329 | 12:03:34.92+1.98 s | 12:03:36.24+3.30 s | 1.32 | 17.2 |
| RQRRonquières | 7.5 | 91 | 12:03:34.10+1.16 s | – | – | – |
| BRQBracquegnies | 14.1 | 175 | 12:03:35.22+2.28 s | – | – | – |
| LESLessines | 22.7 | 301 | – | 12:03:38.08+5.14 s | – | – |
| BOUBougnies | 27.2 | 207 | 12:03:37.33+4.39 s | 12:03:41.13+8.19 s | 3.80 | – |
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