The first quake struck about 60 kilometres east of Parma, according to the Geographical Institute of Modena, and sent panicked residents rushing into the streets in quake-struck cities, including Pisa and Venice.
Yesterday's quakes followed a 6.0 magnitude quake in the industrial northeast on May 20th which killed six people and left thousands in makeshift tent dwellings, with many homes and historic buildings reduced to rubble.
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It was in the church in Bologna that Cassini set up a solar observatory in the 1600s. It was a simple hole in the church roof letting a pin-hole image of the sun project onto the floor of the nave. It was so accurate (for those days) that it detected the slow reduction or convergence of the Obliquity of the Ecliptic. That is the 22,000 year cycle which is one of the 3 orbital forcing phenomena controlling the stadial/interstadial climate cycles. It is still running, as a tourist attraction. One hopes Bologna was stable enough to avoid even minute disturbances caused by the earthquakes.
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