Here is a comparison of the sites of highest intensity shaking in the 1703 M~6.7 and 1997 M=6.1 Umbria-Marche earthquakes (the two panels on the right) with the aftershocks of the 23 August 2016 M=6.2 shock. The rupture zones of the 1703 and 1997 shocks abut or overlap, but there appears to be a gap of about 20 km between the 1997 and 2016 ruptures. The left two panels are from Galli, Galadini and Calzoni (2005); the right panel is a Temblor map, which uses the EMSC aftershocks.

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Here is a comparison of the sites of highest intensity shaking in the 1703 M~6.7 and 1997 M=6.1 Umbria-Marche earthquakes (the two panels on the right) with the aftershocks of the 23 August 2016 M=6.2 shock. The rupture zones of the 1703 and 1997 shocks abut or overlap, but there appears to be a gap of about 20 km between the 1997 and 2016 ruptures. The left two panels are from Galli, Galadini and Calzoni (2005); the right panel is a Temblor map, which uses the EMSC aftershocks.

Here is a comparison of the sites of highest intensity shaking in the 1703 M~6.7 and 1997 M=6.1 Umbria-Marche earthquakes (the two panels on the right) with the aftershocks of the 23 August 2016 M=6.2 shock. The rupture zones of the 1703 and 1997 shocks abut or overlap, but there appears to be a gap of about 20 km between the 1997 and 2016 ruptures. The left two panels are from Galli, Galadini and Calzoni (2005); the right panel is a Temblor map, which uses the EMSC aftershocks.

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