Andernach (DE)
Quarry blast26 May 2021
- Magnitude
- 1.7ML
- Depth
- –
- Belgian time
- 11:53:072021-05-26
- UTC
- 09:53:072021-05-26
Main parameters
| Date and time | 2021-05-26 09:53:07 UTC 2021-05-26 11:53:07 Belgian time |
|---|---|
| Magnitude | ML 1.7 |
| Epicentral coordinates | 50.435° N, 7.379° E Uncertainty ± 6.3 km |
| Event ID | ROB 13540 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2021-05-26 20:24:52 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
- 93.0 – 108.8km
- Mean velocity, P wave
- 7.7km/s
- Mean velocity, S wave
- 3.9km/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: 5 measurements, root-mean-square deviation 0.31 s. S wave: 4 measurements, root-mean-square deviation 0.43 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 | 93.0 | 276 | 09:53:23.43+15.64 s | – | – |
| HOUHouvegnez | 98.1 | 265 | 09:53:24.90+17.11 s | 09:53:37.51+29.72 s | 12.61 |
| MEMHMembach | 99.0 | 282 | 09:53:24.14+16.35 s | 09:53:37.02+29.23 s | 12.88 |
| MEMSMembach | 99.0 | 282 | 09:53:24.32+16.53 s | 09:53:36.51+28.72 s | 12.19 |
| Dutch seismic network (KNMI)1 station | |||||
| HGNHeimansgroeve | 108.8 | 290 | 09:53:25.70+17.91 s | 09:53:39.56+31.77 s | 13.86 |