People wait outside after evacuating an Indonesian government building following an earthquake in Makassar, South Sulawesi, Indonesia, Dec 14, 2021. (DAENG MANSUR / AP)
JAKARTA/MANILA – A 6.9-magnitude earthquake jolted Indonesia's western province of North Sumatra early Monday, but no immediate report of damage or casualty was issued, an agency and officials said.
The quake triggered no tsunami, the Meteorology, Climatology and Geophysics Agency said.
The quake struck at 4:09 am Jakarta time on Monday, with the epicenter at 161 km southeast of Nias Selatan district and the depth at 25 km under the seabed, the agency said.
The quake struck at 4:09 am Jakarta time on Monday, with the epicenter at 161 km southeast of Nias Selatan district and the depth at 25 km under the seabed, said the Meteorology, Climatology and Geophysics Agency
A 6.0 magnitude aftershock followed the main quake at 4:38 am Jakarta time Monday, it said.
The jolts were also felt in nearby provinces of West Sumatra and Jambi, according to the agency.
In North Sumatra province, the intensity of the quake was felt at IV MMI (Modified Mercalli Intensity) in Nias Selatan district and Gunungsitoli town, it added.
In West Sumatra province, the intensity was felt at IV MMI in the provincial capital of Padang, Siberut island, and III MMI in Padang Panjang town, Bukit Tinggi town, Pasaman Barat district, Pasaman district and Tua Pejat village in Mentawai Island district, the agency further said.
The jolts were only felt at II MMI in Jambi province's Kerinci district, it added.
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Two senior officials of the local disaster agency and local search and rescue office confirmed that there were no immediate report of damage or casualty triggered by the tremors.
"The jolts were felt, but so far, there are no reports of buildings or houses destroyed or those injured. However, we still monitor the risks of the quake," Agus Wibisono, head of the Search and Rescue Office for Nias Island, where Nias Selatan and Gunungsitoli are situated, told Xinhua by phone.
Similarly, the Head of the Operation Unit of the Disaster Management and Mitigation Agency of West Sumatra province, Jumaidi, told Xinhua by phone that there was no immediate report of casualty or damage in the province triggered by the tremors.
"In Padang city, Siberut and others, there are no damages. However, we are still monitoring the situation," the official said.
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Meanwhile, in the Philippines, an offshore earthquake with a preliminary magnitude of 6.4 jolted Occidental Mindoro province at dawn on Monday, the Philippine Institute of Volcanology and Seismology said.
The institute said the quake, which occurred at 5:05 am local time (2105 GMT Sunday), hit at a depth of 29 km, about 110 km northwest of Lubang town.
The tremor was also felt in Metro Manila, Batangas province, and several areas in the main Luzon island, the institute added.
The institute said the tectonic quake would trigger aftershocks but not cause damage.
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The Philippines has frequent seismic activities due to its location along the Pacific Ring of Fire, characterized by active volcanoes and frequent earthquakes.