WUPPERTAL (DE)
Quarry blast17 July 2019
- Magnitude
- 2.1ML
- Depth
- –
- Belgian time
- 11:45:302019-07-17
- UTC
- 09:45:302019-07-17
Main parameters
| Date and time | 2019-07-17 09:45:30 UTC 2019-07-17 11:45:30 Belgian time |
|---|---|
| Magnitude | ML 2.1 |
| Epicentral coordinates | 51.228° N, 7.031° E Uncertainty ± 3.4 km |
| Event ID | ROB 8395 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2019-07-17 12:41:42 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
- 7
- Epicentral distance
- 92.8 – 151.5km
- 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. Depth not determined: hypocenter placed at the surface for the calculation. S wave: 5 measurements, root-mean-square deviation 0.50 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 | |
|---|---|---|---|---|---|
| Belgian seismic network (Royal Observatory of Belgium)5 stations | |||||
| OPTBOpitter | 98.4 | 263 | – | 09:45:59.46+29.11 s | – |
| MEMHMembach | 99.5 | 227 | – | 09:45:59.70+29.35 s | – |
| MRGMont Rigi | 104.4 | 221 | 09:45:48.87+18.52 s | 09:46:00.32+29.97 s | 11.45 |
| KLBKalborn | 141.4 | 208 | 09:45:53.84+23.49 s | – | – |
| CLAClavier | 151.5 | 234 | 09:45:55.25+24.90 s | – | – |
| Dutch seismic network (KNMI)2 stations | |||||
| HGNHeimansgroeve | 92.8 | 237 | 09:45:45.62+15.27 s | 09:45:56.72+26.37 s | 11.10 |
| VKBValkenburg | 96.2 | 246 | – | 09:45:58.92+28.57 s | – |