Why would the effects of a powerful intraplate earthquake be much greater if it struck New Madrid now than they were in 1911?

Due to more infrastructure.

Explanation:

The effects of a powerful intraplate earthquake is much greater if it struck New Madrid now than they were in 1911 because there are large number of buildings in New Madrid as compared to 1911. These buildings can't bear the impact of that earthquake intensity so it can cause more damage to the infrastructure and huge number of people's life will be in danger.

answer: secession

secession, as it applies to the outbreak of the american civil war, comprises the series of events that began on december 20, 1860, and extended through june 8 of the next year when eleven states in the lower and upper south severed their ties with the union. the first seven seceding states of the lower south set up a provisional government at montgomery, alabama. after hostilities began at fort sumter in charleston harbor on april 12, 1861, the border states of virginia, arkansas, tennessee, and north carolina joined the new government, which then moved its capital to richmond, virginia. the union was thus divided approximately on geographic lines. twenty-one northern and border states retained the style and title of the united states, while the eleven slave states adopted the nomenclature of the confederate states of america.

explanation: