This event was reviewed by an analyst and confirmed.
Type Quarry blast
Magnitude 1.4 MLv
Local datetime 2026/07/27 12:21
Universal datetime 2026/07/27 10:21
Latitude 45.27 ° ± 0.1 km
Longitude 4.17 ° ± 0.1 km
Depth 0 km (operator assigned) ± 0.0 km
See the seismogram of this event.

Near cities

This table shows only the most populated cities around the epicenter.
Name Distance (km) Population
Saint-Étienne  24 172565
Firminy  15 17135
Saint-Just-Saint-Rambert  25 15083
Le Chambon-Feugerolles  18 12317
Roche-la-Molière  21 9697
Monistrol-sur-Loire  2 8718
Unieux  17 8597
Villars  26 7970
La Ricamarie  21 7906
Yssingeaux  15 7202
Saint-Jean-Bonnefonds  30 6638
Saint-Genest-Lerpt  24 6131
Saint-Priest-en-Jarez  28 6120
Aurec-sur-Loire  11 6111
Sainte-Sigolène  5 5959

Past seismicity

  This map shows only the 50 most significant earthquakes around this event.

Event details

Parameters

Evaluation status preliminary
RMS 0.34
Azimuthal gap 98.4 °
Number of stations used 11
Number of phases used 17

Webservices

The data of this event are available in various formats (QuakeML, GeoJSON and text) through the following links :

QuakeML GeoJSON Text

Phases

Network Station Phase Time Residual (s) Azimuth (°) Distance (°) Mode
XP FR14B Pg 10:21:50.97 0.28 336.52 0.23 Manual
G SSB Pg 10:21:51.53 0.21 88.47 0.26 Manual
G SSB Sg 10:21:55.54 0.56 88.47 0.26 Manual
FR COLF Pg 10:21:54.14 0.15 304.26 0.41 Manual
FR COLF Sg 10:21:59.90 0.26 304.26 0.41 Manual
XP FR21A Pg 10:21:54.31 -0.12 152.3 0.43 Manual
XP FR21A Sg 10:22:00.29 -0.12 152.3 0.43 Manual
FR SGSF Pg 10:21:54.70 -0.13 240.25 0.45 Manual
FR SGSF Sg 10:22:01.0 -0.1 240.25 0.45 Manual
FR LBL Pg 10:21:58.68 0.06 266.71 0.65 Manual
FR LBL Sg 10:22:08.20 0.47 266.71 0.65 Manual
FR BNLF Pg 10:22:04.32 0.37 290.71 0.94 Manual
FR FRNF Pg 10:22:07.2 -0.63 276.23 1.14 Manual
FR TRBF Pg 10:22:08.27 -0.06 187.46 1.18 Manual
FR TRBF Sg 10:22:24.45 -0.25 187.46 1.18 Manual
FR LEUC Pg 10:22:10.17 0.38 246.51 1.26 Manual
FR CHLF Pg 10:22:10.7 -0.64 350.07 1.31 Manual