A pair of magnitude 6.0-plus earthquakes occurred within 30 minutes of each other on Tuesday.

Both earthquakes were located in the Pacific Ocean, hundreds of miles apart. Neither earthquake produced reports of significant damage and no tsunami warnings were issued.

According to the United States Geological Survey, a magnitude 6.5 earthquake occurred in the water between Indonesia and the Philippines at 12:38 a.m. local time. A half-hour later, the USGS reported a magnitude 6.2 earthquake deep below the Earth’s surface in the Sea of Japan.

The first quake was centered a few miles southeast of the Talaud Islands of Indonesia, and the USGS reported the tremors caused strong shaking there. While the quake was more than 100 miles away from larger cities, user-submitted data published on the USGS website indicated some people reported weak shaking approximately 200 miles away in Manado, Philippines.

The earthquake was triggered about 13 miles below the Earth’s surface, the USGS reported, while the earthquake that followed in Japan occurred at a much larger depth of 150 miles.

The Japan earthquake was centered about 46 miles northwest of Rumoi and 610 miles north of Tokyo. But because it occurred so far underground, those on the surface didn’t feel its full effect.

The Japan Meteorological Association reported most parts of the country experienced a 2 on its own seismic scale of 0-7, which usually carries only weak shaking and can be undetected by humans.