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Mexico quake – September 2017
Diagram of the comparison of the two major Mexican quakes – measured with the broadband seismograph STS-2 of the BGR at our earthquake station. The S-wave reached Göttingen in both cases 10.5 min after the P-wave. From this transit time difference of the two spacewaves one calculates a distance of about 9600 km. The second quake at 7.1 was one level weaker than the first quake, which reached 8.1. This means an approximately 10 times smaller amplitude of ground movement and about 30 times lower energy release. Please click on the pictures to enlarge.