Criteria used to identify historical earthquakes as triggering observed rockfalls
The criteria used by Kanari (2008) to identify historical earthquakes as triggering the observed rockfalls included:
- Estimated minimum MMI of IX
- Calculated Moment-Magnitude greater than or equal to 6.5
- distance to the site not exceeding 100 km.
Kanari (2008) surmised that these conditions satisfied
Keefer (1984)'s upper limit for disrupted slides or falls triggered by earthquakes. There is no paleoseismic evidence for the mid 8th century CE earthquakes from any of the rockfalls
observed and dated by
Kanari et al (2019) however
It is possible that earthquake generated rockfalls from mid 8th century CE earthquakes were displaced by subsequent quakes or which were not observed by
Kanari et al (2019).