Magnitude 6.5 quake rocks Visayas a day after Luzon's deadly tremor

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Metro Manila (CNN Philippines, April 23) — Another strong tremor hit the country Tuesday, this time a magnitude 6.5 earthquake in the Visayas.

The epicenter was northwest of San Julian town in Eastern Samar province and recorded at 1:37 p.m., the Philippine Institute of Volcanology and Seismology (Phivolcs) said.

But unlike the magnitude 6.1 tremor that shook Luzon on Monday, the latest quake was not as destructive. Phivolcs pointed out its depth of 63 kilometers meant less shaking at the surface.

Monday's tremor with epicenter at Castillejos, Zambales had a depth of only 12 kilometers, resulting in damaged structures especially in soft-soiled Pampanga. It also left at least 16 people dead.

Meanwhile, there were no major damage reported from the Eastern Samar quake. The Office of Civil Defense in Eastern Visayas (OCD-8) said there were minor cracks in some buildings and roads near the epicenter.

Phivolcs Director Renato Solidum told CNN Philippines damage can only be expected "if the structures and houses in the epicenter were not built properly."

OCD-8 reported that at least one person suffered "minor injury," but did not disclose details.

A number of areas in the Visayas, particularly in Northern Samar, Eastern Samar, and Calbayog City, Samar had power interruptions due to the quake, according to the Department of Energy.

Phivolcs said there is no tsunami threat anywhere in the country.

Aftershocks are expected from Tuesday's quake, Solidum said, but stressed that "some of these may not be felt at all, [just] minor shaking."

Intensity 6, classified by Phivolcs as “very strong,” was recorded in San Julian.

But Solidum told CNN Philippines, "At intensity 6 we don’t expect severe damage to structures."

A "strong" intensity 5 was recorded in Tacloban City; Catbalogan City, Samar; Gen. MacArthur, Salcedo and Guiuan in Eastern Samar; Naval, Biliran; Catarman, Northern Samar; and Palo and Pastrana, Leyte.

Meanwhile, the shaking was felt at intensity 4 in Abuyog, Hilongos, Javier, Capoocan, Julita, Baybay, Barugo, Jaro, MacArthur, Matalom, Villaba, Leyte; San Francisco, Southern Leyte; Bislig City, Surigao Del Sur; Iloilo City; Naga City; Sorsogon City; and Panganiban, Catanduanes.

Intensity 3 was felt in Binalbagan, Negros Occidental; San Juan (Cabalian), Southern Leyte; Dimasalang, Masbate; Butuan City; and Cabadbaran City, Agusan del Norte; while intensity 2 was recorded in the city of Bago in Negros Occidental and Bacolod City.

Phivolcs said the quake was tectonic in origin, or there was a movement in the Earth's crust.

It also noted that the Luzon and Visayas tremors were not related, and the first did not trigger the second.