Police in Ujung Kulon, Banten province, said they had not received any reports of damage or injuries from a 6.4 magnitude quake that struck in Indonesia's Sunda Strait on Friday afternoon. The temblor caused buildings to shake some 187 kilometers away in Jakarta.
No tsunami warning was issued.
The quake struck 185 kilometers of Sukabumi, at a depth of 53.7 kilometers, according to the US Geological Survey. The USGS initially assigned it a magnitude of 6.5 but later downgraded it to 6.1.
In Cilegon on the west Java coast, residents said the earth shook powerfully but there was no evidence of damage.
The tremor was felt at between II and IV MMI in Jakarta. This level is considered to pose a relatively low threat to buildings and other structures, said Suharjono, head of the seismology desk at the Meteorology, Climatology and Geophysics Agency (BMKG).
Officials at Ujung Kulon National Park said there did not appear to be any damage to the 1200-square-kilometer reserve. PT Krakatau Steel’s plant in Banten province was reportedly unaffected.
Don Makaha of Ombak Liar Surf Adventure said the epicenter was close to the island of Panaitan, which used to be home to a surf camp but has been abandoned since 2005. He said he was trying to establish contact with surfing charter boats in the area, but had not yet succeeded.
People fled high-rise buildings in Jakarta when the rumbling began. Robert Simanungkalit and his girlfriend had ordered food on the 10th floor of Plaza Semanggi.
"We just ran down the emergency stairs," he said. "We're still afraid to go back because there might be aftershocks."
Suharjono said it was impossible to know whether the quake was related to the devastating quake that struck West Sumatra earlier this month.
JG, Bloomberg
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