MANILA (4th UPDATE) - A magnitude 6.6 earthquake struck off Batangas province early Saturday morning, Phivolcs said.

The tectonic quake occurred at 4:49 a.m. approximately 16 kilometers southwest of Calatagan town at a depth of 116 km.

The earthquake was felt in Metro Manila, Cavite, Tagaytay, and nearby areas, rousing residents in their sleep just as monsoon rains continued to dampen parts of Luzon.

A 5.5-magnitude aftershock occurred 12 kms southwest of Calatagan minutes after the initial quake.

The quake damaged houses in Lubang Island, Occidental Mindoro, as seen in photos from Lubang Mayor Michael Orayani.

TINGNAN: Iniwang pinsala ng magnitude 6.7 na lindol sa Lubang Island, Occidental Mindoro. (📷: Michael Orayani) | via @Dennis_Datu

Kaugnay na ulat: https://t.co/fELm8PZeBm pic.twitter.com/0nVcJDMgpX

— ABS-CBN News (@ABSCBNNews) July 23, 2021

Photos from the Calatagan Municipal Disaster Risk Reduction and Management Office, meanwhile, showed that the quake shook bottles off shelves in a convenience store.

It also triggered a landslide in the town.

As of past 7 a.m., Phivolcs has recorded 16 smaller shocks around the same area ranging from magnitude 1.7 to magnitude 3.

As of past 7 a.m., Phivolcs has recorded 16 smaller shocks around the same area ranging from magnitude 1.7 to magnitude 3.

Phivolcs said the quake is not expected to trigger a tsunami that may threaten Philippine seaside areas.

The agency's bulletin showed the following intensities were felt in these areas after the main quake:

• Intensity V - Calapan City and Puerto Galera, Oriental Mindoro; Sablayan and Magsaysay, Occidental Mindoro; Carmona and Dasmariñas City, Cavite
• Intensity IV - Quezon City; Marikina City; Manila; Makati City; Taguig City; Valenzuela City; Pasay City; Tagaytay City, Cavite; Batangas City and Talisay City, Batangas; San Mateo, Rizal
• Intensity III - Pasig City; San Jose del Monte City, Bulacan

Instrumental Intensities:

• Intensity V - Calapan City & Puerto Galera, Oriental Mindoro
• Intensity IV - Batangas City, Batangas; Carmona, Cavite; Calumpit & Plaridel, Bulacan
• Intensity III - Quezon City; Marikina City; Pasig City; Las Piñas City; Muntinlupa City; Malabon City; Navotas City; San Ildefonso, Pandi, Malolos, San Rafael, and Marilao, Bulacan
• Intensity II - San Juan City; Dagupan City; Polillo, Quezon
• Intensity I - Guinayangan, Quezon; Magalang, Pampanga; Iriga and Sipocot, Camarines Sur; Daet, Camarines Norte; Palayan City, Nueva Ecija; Iloilo City; Kalibo, Aklan; San Jose City, Antique; Bago City, Negros Occidental

There were no reported casualties and no severe damage to essential infrastructure, the National Disaster Risk Reduction and Management Council said Sunday.

"Walang kailangan ilikas na maramihan because of this," NDRRMC spokesman Mark Timbal told ABS-CBN's Teleradyo.

(We didn't need to evacuate many people because of this.)

Before the earthquake, five evacuation centers were opened in Calatagan, catering to 47 families or 198 individuals affected by the habagat, said Ronald Torres, head of the Calatagan disaster office, in a separate interview Sunday on TeleRadyo.

But some have already been advised to return home since the floods have subsided, he added.

"Ang damage, wala pang severe damage to essential infrastructure. May damage po to houses," Timbal said.

(As for damage, there's no severe damage to essential infrastructure. Houses were damaged.)

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