Alert for megathquake in the central U.S.: necessary risk and preparation.

The scientific community is on alert due to the imminent risk of a megathrust earthquake that could shake the heart of the United States in the near future. Although media attention has historically focused on seismic threats from the West Coast, particularly the famous San Andreas Fault, experts warn that the New Madrid Seismic Zone (NMSZ) poses a significant danger that should not be underestimated. With a 40% probability of experiencing an earthquake of magnitude greater than 6 in the next 50 years, this region becomes a focal point of concern for millions of residents. The NMSZ encompasses an extensive strip of 241 kilometers that stretches across several states, including Missouri, Arkansas, Tennessee, Kentucky, and Illinois. Despite its destructive potential, knowledge about seismic activity in this area is limited compared to what is known about the West Coast. However, recent studies have provided alarming data, suggesting that the geological conditions in the NMSZ are conducive to significant seismic events. Robbie Myers, emergency coordinator for the Missouri Department of Safety, has highlighted the fact that this risk is not hypothetical; as years go by, the likelihood of a major earthquake in this area increases. The cities of Saint Louis and Memphis, with their dense populations and vital infrastructure, are in the line of fire. A seismic event in this region could have devastating consequences, resulting in the collapse of bridges and destruction of roads that are essential for transportation and emergency response. One of the greatest risks associated with a megathrust earthquake in the NMSZ is its potential to disrupt river transport on the Mississippi River, further complicating logistics for aid and evacuation. With bridges collapsing and roads cut off, access routes for rescue teams would be severely impacted. In this context, preparation and practice become essential tools to mitigate the consequences of an impending disaster. Aware of this reality, at-risk states have begun implementing drills and preparedness exercises. Recently, the National Guard conducted drills in Saint Louis in anticipation of a catastrophic scenario involving an 8.4 magnitude earthquake. These initiatives aim not only to prepare response teams but also to raise public awareness about the importance of being ready for a natural disaster. Professor Eric Sandvol from the University of Missouri emphasizes the need for further research on earthquakes in this lesser-known region. His message is clear: a megathrust earthquake could affect an area 20 times larger than earthquakes in California, underscoring the urgency of taking proactive measures. The geology of the bedrock in the central United States plays a crucial role in the magnitude of the tremors that could be experienced. Emergency response in a megathrust earthquake scenario would largely depend on the availability of air transport, given the probable destruction of road infrastructures. This raises serious concerns about the ability of emergency services to act at a critical moment. Therefore, planning and training are fundamental to ensuring an effective response. Despite the seriousness of the situation, the issue of a megathrust earthquake in the central United States remains largely ignored by the media and public opinion. This may be partly due to the lack of a recent seismic event that keeps the issue in the spotlight. However, preparedness and awareness are crucial in the fight against complacency regarding this matter. It is imperative that at-risk communities inform themselves and prepare adequately. Authorities must continue to invest in research and monitoring to minimize the impact of a potential megathrust earthquake. History teaches us that nature can be unpredictable, and the need to be prepared has never been more urgent. The protection of millions of lives in the heart of the United States depends on the actions we take today to face the challenges that lie ahead.