A magnitude 4.6 earthquake struck about 120 kilometers northeast of Hengchun, Taiwan, at 22:44 UTC on September 13, 2026, according to the U.S. Geological Survey. The agency placed the epicenter at 22.740 degrees north, 121.602 degrees east, at a depth of 10 kilometers. No damage or casualties have been reported in the USGS event data.
KEY FACTS
- The U.S. Geological Survey reported a magnitude 4.6 earthquake about 120 kilometers northeast of Hengchun, Taiwan, at 22:44 UTC on September 13, 2026.
- The epicenter was located at 22.740 degrees north, 121.602 degrees east, at a depth of 10 kilometers, according to the USGS.
- The USGS event page did not include reports of damage, casualties or a tsunami warning.
- Taiwan sits along a major seismic belt, and earthquakes of this size are common in the region.
CONTEXT
Taiwan lies on the boundary between the Philippine Sea and Eurasian tectonic plates, one of the most seismically active zones in the world. The USGS event page lists the quake at magnitude 4.6 with a shallow depth of 10 kilometers, a combination that can produce noticeable shaking near the epicenter. The location, roughly 120 kilometers northeast of Hengchun at the island's southern tip, is offshore in the Taiwan Strait area. The USGS is a primary authority for seismic data and its event page is the sole source for the details in this report. No independent seismic network readings, local government statements or emergency response reports were included in the supplied evidence. The absence of damage reports in the USGS data does not by itself confirm that no damage occurred; it reflects what the agency had published at the time of the event listing.
WHY IT MATTERS
Taiwan's economy and population are concentrated in coastal and urban areas that are regularly exposed to seismic activity. Even moderate offshore earthquakes can disrupt transport, power and communications, and they are closely watched because they can precede or follow larger events. For regional planners and residents, each quake is a reminder of the importance of building codes, early warning systems and emergency drills. The limited information available so far means the practical impact remains unclear, but the event is a routine test of the island's seismic monitoring and response capacity.
WHAT TO WATCH
- Whether Taiwan's Central Weather Administration or other local authorities issue a statement on shaking intensity or damage.
- Whether the USGS revises the magnitude, depth or epicenter as more data becomes available.
- Whether any aftershocks are recorded in the same area.
- Whether emergency services or local media report any disruption to infrastructure or daily life.