No magnitude 7.0 or greater earthquake has struck anywhere on Earth since the April 20 event off Japan’s Sanriku coast, according to the latest USGS catalog, leaving a roughly four-week quiet period that shapes trader focus on the timing of the next one. Globally these events average about 15–16 per year and cluster along Pacific Ring of Fire subduction zones, where tectonic plates converge and release stored strain through large slips on major faults. The USGS continuously monitors seismic networks and fault systems worldwide, but no reliable short-term precursors exist for magnitude 7+ quakes; activity can resume abruptly after lulls of weeks or months. With the year already recording five such events through mid-May and resolution thresholds tied to official magnitude and timing windows, any new USGS report of a qualifying event will immediately shift market-implied odds.