ORCQ (BE)
Known mine explosion5 February 2015
- Magnitude
- 1.3ML
- Depth
- 9.4km ± 5.5
- Belgian time
- 13:00:232015-02-05
- UTC
- 12:00:232015-02-05
Main parameters
| Date and time | 2015-02-05 12:00:23 UTC 2015-02-05 13:00:23 Belgian time |
|---|---|
| Magnitude | ML 1.3 |
| Epicentral coordinates | 50.601° N, 3.342° E Uncertainty ± 3.3 km |
| Depth of hypocenter | 9.4 ± 5.5 km |
| Event ID | ROB 5291 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2015-02-05 14:39:22 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
- 10
- Epicentral distance
- 37.5 – 140.5km
- Mean velocity, P wave
- 6.8km/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 9.4 km. P wave: 8 measurements, root-mean-square deviation 0.18 s.
Stations farther than 120 km are left out of the fit: the first waves to reach them have travelled beneath the crust, through the mantle, where they propagate faster.
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)10 stations | ||||||
| LESLessines | 37.5 | 71 | 12:00:30.82+7.10 s | 12:00:34.46+10.74 s | 3.64 | – |
| BOUBougnies | 48.8 | 119 | 12:00:32.47+8.75 s | – | – | – |
| SKQSteenkerque | 52.5 | 84 | 12:00:32.75+9.03 s | – | – | – |
| BRQBracquegnies | 57.8 | 103 | 12:00:33.54+9.82 s | – | – | – |
| RQRRonquières | 62.5 | 89 | 12:00:34.02+10.30 s | – | – | – |
| SNFSeneffe | 67.5 | 98 | 12:00:35.02+11.30 s | – | – | – |
| OSTBOostende | 76.4 | 338 | 12:00:36.67+12.95 s | – | – | – |
| DOUDourbes | 105.4 | 122 | 12:00:40.51+16.79 s | – | – | – |
| GESGesves | 126.1 | 100 | 12:00:45.22+21.50 s | – | – | – |
| CLAClavier | 140.5 | 98 | 12:00:47.11+23.39 s | 12:01:04.95+41.23 s | 17.84 | 3.6 |