MALMEDY (BE)
Quarry blast13 August 2018
- Magnitude
- 0.9ML
- Depth
- –
- Belgian time
- 14:30:572018-08-13
- UTC
- 12:30:572018-08-13
Main parameters
| Date and time | 2018-08-13 12:30:57 UTC 2018-08-13 14:30:57 Belgian time |
|---|---|
| Magnitude | ML 0.9 |
| Epicentral coordinates | 50.449° N, 6.040° E Uncertainty ± 0.1 km |
| Event ID | ROB 7120 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2018-08-13 15:08:25 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
- 7.3 – 39.2km
- Mean velocity, P wave
- 5.6km/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. Depth not determined: hypocenter placed at the surface for the calculation. P wave: 4 measurements, root-mean-square deviation 0.10 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 | |
|---|---|---|---|---|---|
| Belgian seismic network (Royal Observatory of Belgium)4 stations | |||||
| MRGMont Rigi | 7.3 | 20 | 12:30:58.48+1.38 s | 12:30:59.26+2.16 s | 0.78 |
| HOUHouvegnez | 10.9 | 193 | 12:30:59.12+2.02 s | – | – |
| MEMSMembach | 17.9 | 353 | 12:31:00.60+3.50 s | 12:31:02.70+5.60 s | 2.10 |
| KLBKalborn | 39.2 | 173 | 12:31:04.19+7.09 s | – | – |
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