© News Asia One
Kalimantan is among the regions in the archipelago known to be
free of earthquakes,
but a recent series of light to strong quakes recorded in North Kalimantan have shaken that belief.
The latest quake was one recorded measuring 5.7 on the Richter scale that hit Tarakan on Tarakan Island in North Kalimantan at 9.31 a.m. local time on Wednesday.
Meteorology, Climatology and Geophysical Agency (BMKG) Balikpapan station head Mudjianto said the earthquake's epicenter was located in the Sulu Sea, which was closer to cities in the Malaysian state of Sabah, such as Sandakan, Kota Kinabalu, Lahat Datu, Tawau and Beaufort.
Cities in Indonesia that were close to the quake's epicenter were Tarakan on Tarakan Island and Tideng Pale in the Tana Tidung regency, located 432 kilometers away, and Nunukan in the Nunukan regency, located at the border with Sabah and across from Tawau, located 416 km from the epicenter.
"We did not calculate the quake's duration given the distance," said Mudjianto. He added that the duration could only have been recorded had the tremor reached human settlements or human structures. The magnitude of this quake was recorded by sensors owned by BMKG and was not felt on the sea, or on land in Kalimantan, or on the surrounding islands.
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