Unearthing the Lingering Tremors: USA's Enduring Aftershocks from 1800s Earthquakes

Recent earthquakes in the USA may actually be aftershocks of massive earthquakes that occurred in the 1800s, according to a study by researchers from the University of Missouri and Wuhan University. By analyzing seismic data, the team found that up to 65% of seismic activity in the New Marid seismic zone between 1980 and 2016 is likely aftershocks of earthquakes that occurred in 1811-1812. The study suggests that aftershock sequences can last for decades to centuries, and understanding the distinction between current seismic activity and aftershocks could help predict future earthquake risks. However, some experts remain cautious about the results and believe further research is needed.