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1/7

7+(

3+,/,333,1(6

6(,60,&

,1)250$7,21PREPARED BY :

BOBBY G. LIMETA, SDT / IIT / IET / ECE / AST-METTECHNICAL CONSULTANT

NON-STRUCTURAL EARTHQUAKE SAFETY AND HAZARDS MITIGATION

-%($3,1'8675,(6,1&METRO-MANILA. PHILIPPINES

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SEISMIC HAZARD MAP OF THE PHILIPPINES

COURTESY OF THE

UNITED STATES GEOLOGICAL SURVEY (U.S.G.S.)

STRAND EARTHQUAKE CONSULTANTS - Los Angeles, CA. U.S.A.

5.6 m/sec2

4.8 m/sec2

4.0 m/sec2

3.2 m/sec2

2.4 m/sec2

1.6 m/sec2

0.8 m/sec2

0.4 m/sec2

0.2 m/sec2

0

0.60g

0.50g

0.40g

0.32g

0.24g

0.16g

0.08g

0.04g

0.02g

0

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Philippine Seismic Zone Map In Accordance To The Seismic StudiesBy Torregoza, Sugito & Nojima Of The Gifu University In Japan And PHIVOLCS - Philippines.

FOUR MAJOR CITIESOF THE PHILIPPINESSEISMICALLY ACTIVE

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WORLDWIDE SEISMIC ZONE TABULATIONS FOR COUNTRIES MAPPED INTOSEISMIC ZONE 3.0 & ZONE 4.0 [ MAJOR EARTHQUAKE DISTURBANCES ]

SOURCE : TRI-SERVICES MANUAL FOR MILITARY CONSTRUCTION[ BASED ON THE UNIFORM BUILDING CODE ]

AFRICA Zone

Algeria = Algier & Oran 3.0Ethiopia = Asmara 3.0Malawi = Blantyre, Lilongwe, & Zomba 3.0Morocco = Tabgier 3.0South Africa = Capetown 3.0Southern Rhodesia = Salisbury 3.0Tunisia = Tunis 3.0Zaire = Bukava 3.0

ASIA

Afghanistan = Kabul 4.0Burma = Mandalay & Rangoon 3.0China = Peking & Tihwa 4.0

Tsingtao 3.0Cyprus = Nicosia 3.0India = Bombay & New Delhi 3.0Indonesia = Bandung, Jakarta, & Surabaya 4.0

Medan 3.0Iran = Isfahan, Shiraz, & Tehran 3.0

Tabriz 4.0Iraq = Baghdad 3.0Israel = Haifa, Jerusalem, & Tel Aviv 3.0

Japan = Itazuke AFB, Misawa AFB, &Wakanai 3.0Okinawa, Osaka, Kobe, Tokyo,Yokohama, & Yokota 4.0

Lebanon = Beirut 3.0

Nepal = Katmandu 4.0Pakistan = Karachi & Peshawar 4.0Syria = Aleppo & Damascus 3.0Taiwan = All Parts Of The Country 4.0Turkey = Istanbul & Karamursel 3.0

CARIBBEAN SEA

Dominican Republic = Sto. Domingo 3.0Haiti = Port Au Prince 3.0Jamaica = Kingston 3.0Puerto Rico 3.0Trinidad 3.0

CENTRAL AMERICA

Costa Rica = San Jose 3.0El Salvador = San Salvador 4.0Guatemala 4.0Honduras = Tegucigalpa 3.0Mexico = Guadalajara, Mexico City, & Tijuana 3.0Nicaragua = Managua 4.0Panama = Colon & Panama 3.0

EUROPE Zone

France = Marseille & Nice 3.0Greece = Athens 3.0

Thessaloniki 4.0Iceland = Keflavik 3.0

Reykjavik 4.0Italy = Aviano AFB, Genoa, Naples, & Trieste 3.0

Sicily 4.0Portugal = Lisbon 4.0

Opporto 3.0

SOUTH AMERICA

Bolivia = La Paz 3.0

Chile = Santiago 4.0Colombia = Bogota 4.0Ecuador = Quito 4.0

Guayaquil 3.0Peru = Lima & Piura 4.0Venezuela = Caracas 4.0Fiji = Sura 3.0Mariana Islands = Guam, Saipan, & Tinian 3.0New Guinea = Port Moresby 3.0

NORTH AMERICA - United States

Alaska 3.0 & 4.0Washington 3.0

California 4.0Utah 3.0Wyoming 4.0

Some parts of Alaska, Washington, California, Utah, andWyoming are mapped into the Zone 3.0 & Zone 4.0Vancouver, BC. Canada may also be tabulated into SeismicZone 3.0 & Zone 4.0 in the Western Region Of NorthAmerica due to Ms = 6.8 up to 8.0 Magnitude in the RichterScale.

PACIFIC OCEAN AREA

SAMOA 3.0

NEW ZEALAND = Auckland 3.0Wellington 4.0

PHILIPPINES = Manila & Cebu 4.0DavaoBaguio 4.0

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Magnitude Versus Intensity

Magnitude and Intensity measures different characteristics of earthquakes. Magnitude measures the energy released at thesource of the earthquake. Magnitude is determine from measuring seismographs. Intensity measures the strength of shakingproduced by earthquake at a certain location. Intensity is determined from the effects on people, human structures, and thenatural environment.

The following table gives intensities that are typically observe at locations near the epicenter of earthquakes of differentmagnitude. Magnitude in the Richter Scale Vs. Modified Mercalli Scale.

Courtesy Of Federal Emergency Management Agency - U.S.A

Magnitude Intensity Description PeakAcceleration

1.0 ~ 3.4 I I. Not felt except by a very few under especially favorable conditions.

3.5 ~ 4.2 II ~ III II. Felt only by few persons at rest, especially upper floors of buildings.

III. Felt quite noticeably by persons indoors, especially on upper floorsof buildings. Many people dont recognize it as an earthquake.Standing motor cars may rock slightly. Vibrations similar to thepassing truck. Duration estimated

4.3 ~ 4.8 IV ~ V IV. Felt indoors by many, outdoors by few during the day. At night,some awakened. Dishes, windows, doors disturbed, walls makecracking sound. Sensation like heavy truck striking building.Standing motor cars rocked noticeably.

V. Felt by nearly everyone, many awakened. Some dishes, windowsbroken. Unstable object overturned. Pendulum clock may stop.

0.015g up to0.02g

0.03g up to0.04g

4.9 ~ 6.1 VI ~ VII VI. Felt by all, many, many frightened. Some heavy furniture move, aFew instances of fallen cement plaster. Damage slight.

VII. Damage negligible in buildings of good design and construction.Slight to moderate in well-built ordinary structures. Considerabledamage in poorly built or badly designed structures. Some

chimneys broken.

0.04g up to0.08g

0.08g up to0.16g

6.2 ~ 6.9 VIII ~ IX VIII. Damage slightly in specially designed structures, considerabledamage in ordinary substantial buildings with partial collapse.Damage great in poorly built structures. Fall of chimneys, factorystacks, columns, monuments, and walls. Heavy furnitureoverturned.

0.16g up to0.32g

IX. Damage considerable in specially designed structures, well-designed frame structures thrown out of plumb. Damage great insubstantial buildings, with partial collapsed. Buildings shifted offfoundations.

0.32g up to0.55g

7.0 ~ 7.3

And

7.4 ~ 8.1

Higher

X

And

Higher

X. Some well-built wooden structures destroyed, most masonry and

frame structures destroyed with foundations. Rails bent.

XI. Damage considerable in specially designed structures, well-designed frame structures thrown out of plumb. Damage great insubstantial buildings, with partial collapsed. Buildings shifted offfoundations.

XII. Total damage. Lines of sight and level are destroyed. Objectsthrown into the air.

0.55g up to

0.80g

0.80g up to1.0g

More than

1.0g

START OF CRITICAL LEVEL