YAEYAMA DISTRICT, Okinawa — A 5.5 magnitude quake was detected near Yonakuni Thursday afternoon, the U.S. Geological Survey reported.

A tremor jolted the area at 07:45 UTC (16:45 local time). The earthquake’s epicenter was situated roughly 16 km north-northwest of Yonakuni and occurred at a depth of 114 km. Seismologists first reported it as a 5.9 event, but later downgraded it to 5.5.

Did you feel it?

If you noticed the quake, you can share your observations using the USGS Felt Report form. 22 people have submitted responses through the agency’s online form, reporting they experienced the tremor. Weak shaking was registered, and people in several cities — including Sanchung, Yungho and Hsichih — reported feeling the earthquake, according to the USGS DYFI report.

Impact and estimated losses

Green alert for shaking-related fatalities and economic losses. There is a low likelihood of casualties and damage. Recent earthquakes in this area have caused secondary hazards such as landslides that might have contributed to losses.

Structure information summary
Overall, the population in this region resides in structures that are resistant to earthquake shaking, though vulnerable structures exist. The predominant vulnerable building types are heavy wood frame and reinforced/confined masonry construction.

Historical information
A magnitude 7.6 earthquake 229 km southwest of this event struck Chi Chi, Taiwan on September 20, 1999 (UTC), with estimated population exposures of 2,337,000 at intensity VIII and 1,778,000 at intensity IX or greater, resulting in a reported 2,489 fatalities.

Source: The U.S. Geological Survey