DEUX-ACREN (BE)
Quarry blast1 June 2018
- Magnitude
- 2.0ML
- Depth
- 2.0km ± 3.7
- Belgian time
- 11:40:152018-06-01
- UTC
- 09:40:152018-06-01
Main parameters
| Date and time | 2018-06-01 09:40:15 UTC 2018-06-01 11:40:15 Belgian time |
|---|---|
| Magnitude | ML 2.0 |
| Epicentral coordinates | 50.738° N, 3.860° E Uncertainty ± 3.3 km |
| Depth of hypocenter | 2.0 ± 3.7 km |
| Event ID | ROB 6695 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2018-06-01 12:02:29 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
- 3.3 – 174.9km
- Mean velocity, P wave
- 5.7km/s
- Mean velocity, S wave
- 3.4km/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: 6 measurements, root-mean-square deviation 0.23 s. S wave: 4 measurements, root-mean-square deviation 0.37 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 | 3.3 | 201 | 09:40:16.71+0.72 s | 09:40:16.92+0.93 s | 0.21 | – |
| RQRRonquières | 29.7 | 120 | 09:40:21.17+5.18 s | 09:40:24.36+8.37 s | 3.19 | – |
| BRQBracquegnies | 34.7 | 146 | 09:40:22.29+6.30 s | – | – | – |
| BOUBougnies | 39.3 | 171 | 09:40:23.29+7.30 s | – | – | – |
| DOUDourbes | 88.6 | 144 | 09:40:31.74+15.75 s | 09:40:41.38+25.39 s | 9.64 | – |
| CLAClavier | 108.1 | 109 | 09:40:34.74+18.75 s | 09:40:48.02+32.03 s | 13.28 | 8.6 |
| EBNEben-Emael | 128.4 | 86 | 09:40:37.35+21.36 s | – | – | – |
| MEMHMembach | 152.7 | 95 | 09:40:40.79+24.80 s | – | – | – |
| HOUHouvegnez | 157.9 | 105 | 09:40:42.24+26.25 s | 09:41:00.64+44.65 s | 18.40 | – |
| KLBKalborn | 174.9 | 113 | 09:40:43.72+27.73 s | – | – | – |