Earthquakes
USGS page: M 6.0 - Western Indian-Antarctic Ridge
USGS status: Reviewed by a seismologist
Reports from the public: 1 person
6.0 magnitude, 10 km depth
Western Indian Antarctic Ridge
The powerful 6.3-magnitude earthquake was registered near the Solomon Islands on 20 August, the US Geological Survey said.
There have been no immediate reports about casualties or damage caused by the quake. No tsunami warning has been issued.
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It wasn't immediately clear if there were any casualties. The Kandilli observatory said the earthquake took place 10 kilometres (6.2 miles) underground. The USGS said the earthquake had a magnitude of 5.8.
The earthquake, with its epicenter at sea about 36.5 kilometers southeast of Yilan County Hall at a depth of 22.5 km, also caused delays to five south-bound trains operated by Taiwan High Speed Rail Corp., affecting 2,500 passengers.
Shortly after the temblor, President Tsai Ing-wen activated the emergency response mechanism set up after she took office in 2016.
After receiving briefings from the National Security Council, Tsai posted a message on her Facebook and other social media platforms reassuring the public that no major damage or casualties had been reported as a result of the earthquake.

A bird's eye general view of the port of Keelung, where wind and rain warnings have been issued.
Typhoon Lekima, categorised at the strongest typhoon level by Taiwan's weather bureau, was expected to approach off the island's northeastern coast late on Thursday.
It was moving across the ocean in a north-northwesterly direction at 15kmh, weather officials said.
Lekima was carrying maximum winds of 227kmh, as it approaches Taiwan, the weather bureau said.
The bureau issued wind and rain warnings for greater Taipei, the northern port city of Keelung and other northern counties. It also put out a warning to seafarers off the south and east coasts.
A powerful magnitude 7 earthquake struck off Indonesia's island of Sumatra on Friday, prompting authorities to issue a tsunami warning and to order people to evacuate their homes.
The quake hit about 227 km (141 miles) from the city of Teluk Betung on the island at a depth of 59 km (37 miles). Indonesian authorities have warned that the tsunami could reach as high as three meters (10 feet).
"There are some areas at risk of a serious threat of a tsunami that could be as high as three metres," said agency official Rahmat Triyono, as cited by the AFP. "We're still waiting for reports about damage from the quake."
The Indonesian geophysics agency quickly issued a tsunami warning and the country's Disaster Mitigation Agency said that residents on the Banten coast of Java island should "immediately evacuate to higher ground".
There were no immediate reports of damage or casualties from the quake, which the agency said hit at a depth of 49 km (30 miles), about 47 km (29 miles) northwest of the town of Neiafu.
The quake occurred at around 11.30am UK time off the northeastern coast of Japan, about 50 kilometers (31 miles) below the seabed.
After effects were felt in the districts of Fukushima and Miyagi along with the capital city Tokyo, which is around 160 miles away. Authorities say there is no danger of a tsunami, and there were no immediate reports of casualties.
The tremors were strong enough to be felt in the capital Santiago, some 167 kilometers to the northeast.
Footage on social media showed light fixtures and furniture swaying in apartments.
#temblor en edificio, piso 16. Las Condes. pic.twitter.com/Q16eCdUQlf— kotelo (@kotelo) August 1, 2019
No tsunami warning was issued, and there were no reports of damage or casualties.
Comment: Update: Reliefweb on the 5th of August reports: