Our colleagues from the Bulgarian Academy of Science, Geological Institute “Strashimir Dimitrov“, have published a report on the coseismic and secondary effects of the May 22, 2012 Pernik earthquake, Western Bulgaria. The earthquake had a magnitude of MW5.6, see this special website of EMSC. Radulov et al. report intensities of up to VII (MSK) and various coseismic and secondary earthquake effects. Among those effects are:
- Ground cracks, up to 0.05 m vertical displacement
- Sag ponds
- Landslides (maybe triggered by strong rain five days after EQ?)
- Turbidity of water observed in springs after and also before the EQ (two weeks?)
- Sulfur smell
They also attached a kmz-file for GoogleEarth with the locations of the observed features and a electrical resistivity profile which was recorded in the epicentral area.
Radulov, A., Yaneva, M., Shanov, S., Nikolov, V., Kostov, K., Nikolov, N., Hristov, V., Dobrev, N., Mitev, A., 2012. Report on field survey after May 22, 2012 Pernik earthquake June 6, 2012. Part 1: Coseismic geological effects related to May 22, 2012 Pernik earthquake, Western Bulgaria.
Dobrev, N., Ivanov, P., Berov, B., Krastanov, M., 2012. Report on field survey after May 22, 2012 Pernik earthquake June 6, 2012. Part 2: Secondary seismic effects