Phivolcs sees geohazard, flooding risks in Bulacan Airport

Aileen Cerrudo   •   September 25, 2020   •   939

The project site of the proposed New Manila International Airport in Bulacan has geohazard risks, according to the Philippine Institute of Volcanology and Seismology (Phivolcs).

The multi-billion airport is sitting on soft ground and its location is prone to frequent flooding, according to Phivolcs Usec. Renato Solidum.

“Just to be very specific on the facts is that it is far away from the fault. But since it’s underlain by sand with a shallow water table, it’s prone to strong ground shaking and liquefaction,” he said.

Solidum said they conducted an assessment to ensure the safety of the community as well as to protect investments. He recommended making buildings and infrastructure resilient to hazards.

“Dapat iyong building mo ay maayos ang disenyo na maging stable siya habang lumilindol at hindi siya tumagilid. Or pwede mo ring patibayan ang lupa. Bawasan mo iyong tubig, palitan mo iyong lupa, (The building should have a proper design for it to be stable during earthquakes. The ground can also be strengthen by reducing its water content or replacing the soil),” he added.

Meanwhile, San Miguel Holdings Corporation (SMC) said they have been taking into account the risks in designing the P740 billion domestic and international airport in Bulacan. The SMC also assured they have studied the project, including its feasibility, and all possible risks.

“The airport’s design fully takes this into account and we have actually started implementing sustainable measures to address flooding in Bulacan that has existed for several decades and has been made worse by clogged waterways and drainages,” according to SMC.

The corporation also tapped three major global airport construction firms to ensure the airport is resilient, sustainable, and will provide the best benefits for all Filipinos. AAC (with reports from Vincent Arboleda)

Phivolcs records sequence of earthquakes in Bicol region

Maris Federez   •   October 18, 2021

MANILA, Philippines — The Department of Science and Technology-Philippine Institute of Volcanology and Seismology (DOST-Phivolcs) has recorded a sequence of small earthquakes in the Bicol region following a small shallow-seated earthquake with a magnitude of 4.3 and depth of 4 kilometers occurred at 10:08 p.m. on October 14.

The location of the epicenter of the 4.3 magnitude quake was determined to be at 13.65 north latitude and 123.14 east longitude or at 3 kilometers North and 75 kilometers west of Canaman, Camarines Sur.

A total of 27 earthquakes were recorded by the nearest DOST-Phivolcs earthquake monitoring station located in San Jose, Camarines Sur (Station Code: SCSP).

Magnitude ranges from 1.7 to 4.3 with crustal shallow depths between 1 to 40 kilometers.

The last recorded event associated with this earthquake sequence was at 1:22 a.m. on Monday, October 18.

There was no similar event that followed as of 6:00 a.m.

Phivolcs also recorded ten events that were felt at various intensities in the provinces of Camarines Norte, Camarines Sur and Albay.

Calculation of the intensity distribution for the first event was performed using the Rapid Earthquake Damage Assessment System (Redas) software using the latest calculated parameters of the earthquake, according to the statement released by the DOST.

Results show that the magnitude and shallow depth of this inland event has the potential to cause damage in the general vicinity of the epicenter.

The department said it immediately informed the Office of Civil Defense (OCD) about this during the information release of the first event.

The DOST also noted that social media posts indicate that the event was widely felt with unconfirmed observations of non-structural damage (glass door was damaged) and damage to building content.

This prompted OCD to instruct their regional office to investigate the reported damage in the affected areas.

DOST-Phivolcs said that based on the collected data, this sequence of events, showing no identifiable large event, can be considered as an earthquake swarm that may occur in a tectonically active region, as suggested by sparse seismicity in this area of the Bicol region.

DOST-Phivolcs said it will closely monitor any progress of this earthquake activity and will continue to post updated information at the Phivolcs Official website.

IATF places Bulacan, Apayao, Capiz under GCQ beginning October 18

Aileen Cerrudo   •   October 18, 2021

MANILA, Philippines— Quarantine restrictions in the provinces of Bulacan, Apayao, and Capiz have been downgraded, Malacañang announced Sunday.

“The Inter-Agency Task Force for the Management of Emerging Infectious Diseases (IATF) approved the recommendation to place the said provinces under general community quarantine (GCQ) from October 18 to October 31, ” presidential spokesperson Harry Roque said.

Bulacan and Apayao were initially placed under modified enhanced community quarantine (MECQ) while Capiz was previously under GCQ with heightened restrictions.

Under GCQ, any person below 18 years old, above 65 years old, including those with immunodeficiency, comorbidity, or other health risks, and pregnant women, shall be required to remain in their residences at all times, except for obtaining essential goods and services, or for work in industries and offices.

Entertainment and recreational venues, casinos, and outdoor sports are sill not permitted to operate during GCQ. Face-to-face or in-person classes for basic education shall be suspended. AAC

Magnitude 5.2 earthquake hits Calatagan, Batangas

Aileen Cerrudo   •   October 8, 2021

A 5.2 magnitude earthquake hit Calatagan, Batangas at 2:14 a.m. on Friday (October 8), according to the Philippine Institute of Volcanology and Seismology (Phivolcs).

The quake has a depth of 131 kilometers and Intensity II was felt by residents in Calatagan.

Phivolcs said the earthquake was an aftershock of the magnitude 6.6 quake that occurred in the same area on July 24, 2021.

No damage was reported and no further aftershocks are expected. AAC

 

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