HALMA (BE)
Known mine explosion20 June 2014
- Magnitude
- 1.6ML
- Depth
- 3.6km ± 15.3
- Belgian time
- 14:13:392014-06-20
- UTC
- 12:13:392014-06-20
Main parameters
| Date and time | 2014-06-20 12:13:39 UTC 2014-06-20 14:13:39 Belgian time |
|---|---|
| Magnitude | ML 1.6 |
| Epicentral coordinates | 50.076° N, 5.141° E Uncertainty ± 7.1 km |
| Depth of hypocenter | 3.6 ± 15.3 km |
| Event ID | ROB 5158 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2014-06-23 08:22:51 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
- 10.7 – 39.8km
- 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 3.6 km. P wave: 5 measurements, root-mean-square deviation 0.29 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 | ||||||
| RCHRochefort | 10.7 | 35 | 12:13:41.35+1.70 s | – | – | – |
| GESGesves | 34.6 | 354 | 12:13:45.71+6.06 s | – | – | – |
| MRDMaredsous | 36.6 | 313 | 12:13:45.51+5.86 s | – | – | – |
| DOUDourbes | 39.1 | 273 | 12:13:46.86+7.21 s | – | – | – |
| CLAClavier | 39.8 | 17 | 12:13:46.55+6.90 s | 12:13:51.80+12.15 s | 5.25 | 31.1 |
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