A magnitude 6.5 earthquake jolted the northernmost area of Sumatra, Indonesia, at 5:03 a.m. EST today, according to Boston-based catastrophe modeling firm AIR Worldwide.

The quake has strongly impacted Pidie Jaya district, with a population of about 150,000, in Aceh province. Shaking was felt in Banda Aceh as well as several provinces in Thailand, according to Thailand’s National Disaster Warning Center.

At least 12 aftershocks

The epicenter was originally placed undersea, and a tsunami was feared, but this quake has not generated one. There have been at least 12 aftershocks reported.

Indonesia sits along the Pacific Ring of Fire, the seismically active fault line known for producing some of the strongest earthquakes in history,” said Dr. Bingming Shen-tu, assistant vice president at AIR Worldwide. “The devastating December 26, 2004, M9.1 to M9.3 Sumatra-Andaman earthquake occurred in the Sumatra subduction zone in the Sunda Trench, which roughly parallels the western side of the Indonesian island of Sumatra.”

100 fatalities in Aceh province

Nearly 100 fatalities in Aceh province have been reported, as well as more than 600 injuries. These numbers will most likely rise, as rescue operations are in the early stages. President Joko Widodo has ordered all of Indonesia’s government agencies to participate in rescue efforts in Aceh province, which has a level of autonomy in Indonesia.