Important Earthquake Online Test (General Knowledge) Updated

Earthquakes are among the most powerful and destructive natural forces on Earth, and basic knowledge about their causes, measurement, effects, and history is a recurring and high-scoring subject in Pakistan’s most competitive examinations, including CSS (Central Superior Services), PMS (Provincial Management Services), NTS (National Testing Service), PPSC (Punjab Public Service Commission), FPSC (Federal Public Service Commission), SPSC, and KPPSC. Questions on earthquakes appear in General Science, Geography, Current Affairs, and General Knowledge sections, covering facts such as the causes of earthquakes, tectonic plates, seismic waves, the Richter and Moment Magnitude scales, the most powerful earthquakes in history, famous fault lines, earthquake-prone countries, the role of the seismograph, the difference between the epicentre and focus (hypocentre), tsunamis triggered by earthquakes, and major earthquakes that have affected Pakistan. Pakistan sits at the junction of the Eurasian, Indian, and Arabian tectonic plates, making it one of the world’s most seismically active countries — a fact that makes this topic especially relevant and important for Pakistani exam candidates. This specially curated MCQ set for GoTest.com.pk covers all critical angles — scientific definitions, measurement scales, historical earthquakes, earthquake zones, and Pakistan-specific seismic events. Each question is followed by a detailed explanation to help you understand not just the correct answer but also the broader context. Students are strongly advised to read every explanation carefully even after getting the right answer, as exam papers often twist familiar facts. Consistent practice with these MCQs will sharpen your recall and improve your confidence for exam day.

Important Earthquake Online Test (General Knowledge) Updated

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1. What is the "Great Kanto Earthquake" of 1923?

The largest earthquake ever recorded in Asia, measuring Mw 9.5

A Mw 6.0 earthquake that caused minor damage in Tokyo

The earthquake that prompted Japan to build its first seismograph network

A devastating Mw 7.9 earthquake that struck the Tokyo-Yokohama area of Japan, killing approximately 105,000-140,000 people, mostly from fires

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2. What is a "seismograph" (or seismometer)?

An instrument that detects, records, and measures the intensity and duration of seismic waves from earthquakes

A satellite system used to monitor tectonic plate movement

A scale used to classify the damage caused by an earthquake

A device that predicts earthquakes before they occur

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3. What is the 1970 Ancash Earthquake (Peru) known for?

Being the earthquake that prompted the invention of the Richter Scale

Generating the largest tsunami ever recorded in the Pacific Ocean

Being the first earthquake recorded in South America

Triggering one of the deadliest earthquake-induced landslides in history, burying the town of Yungay and killing approximately 70,000 people

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4. What is the National Seismic Monitoring Centre (NSMC) of Pakistan?

Pakistan's official government agency responsible for monitoring, recording, and reporting seismic activity across Pakistan

A private organisation that sells earthquake insurance in Pakistan

A research university in Islamabad dedicated to geology studies

An international body that monitors earthquakes globally from Pakistan

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5. What is the "Great Lisbon Earthquake" of 1755 and why is it historically significant?

The first earthquake ever recorded in Europe, measuring Mw 9.0

The earthquake that first proved the theory of continental drift

A devastating Mw 8.5-9.0 earthquake that destroyed Lisbon, Portugal, triggering a tsunami and fires, and profoundly influencing Enlightenment philosophy and early seismology

The largest earthquake ever recorded in the Atlantic Ocean

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6. What is the "Elastic Rebound Theory" of earthquake generation?

The theory that earthquakes are caused by the elastic rebound of ocean waves

The theory that the Earth's elastic mantle causes earthquakes by rebounding after volcanic eruptions

The theory that tidal forces elastically deform the crust, causing earthquakes

The theory that earthquakes occur when rocks that have been elastically strained by tectonic stress suddenly slip and rebound to an unstrained position, releasing energy as seismic waves

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7. What is "seismic hazard" and "seismic risk"?

Seismic hazard is the probability of earthquake occurrence; seismic risk is the potential for loss (damage, injury, death) combining hazard with vulnerability of the built environment and population

Both terms mean the same thing — the probability of an earthquake occurring

Seismic hazard applies only to coastal areas; seismic risk applies only to inland areas

Seismic hazard is the depth of an earthquake; seismic risk is the magnitude

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8. What is the Moment Magnitude Scale (Mw)?

A European alternative to the American Richter Scale

A scale measuring the moment (time) an earthquake lasts

A scale that measures only the surface damage of earthquakes

An updated, more accurate scale used to measure earthquake magnitude across all sizes, replacing the Richter Scale for large earthquakes

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9. What are "S-waves" in seismology?

Submarine waves — waves that travel only under the ocean

Surface waves — the slowest seismic waves

Shock waves — waves that cause tsunamis

Secondary waves — body waves that travel through solid material only, moving the rock perpendicular to the wave direction

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10. What is "seismic zoning" and why is it important for Pakistan?

The classification of regions into zones based on their level of seismic hazard, used to set building codes and plan infrastructure

The zoning of land around active volcanoes to restrict development

The zoning of coastal areas to manage tsunami risk only

The process of dividing earthquake-damaged areas into zones for reconstruction

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11. What is the study of earthquakes called?

Seismology

Volcanology

Tectonics

Geology

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12. What are the three types of plate boundaries where earthquakes commonly occur?

Hot, Cold, and Neutral boundaries

Magma, Lava, and Rock boundaries

Mountain, Valley, and Ocean boundaries

Convergent, Divergent, and Transform boundaries

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13. What is a "foreshock"?

A tremor felt only at the epicentre before the main shaking

A smaller earthquake that occurs before a larger mainshock in the same area

A strong earthquake that predicts a volcanic eruption

The first wave of a tsunami to reach shore

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14. What is a "fault" in geology?

A volcanic vent that releases magma during earthquakes

A crack in a building's foundation caused by earthquake damage

A fracture or zone of fractures in the Earth's crust along which rocks on either side have moved relative to each other

A deep ocean trench formed by tectonic plate movement

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15. Who proposed the theory of continental drift, a precursor to plate tectonics?

Harry Hess

Charles Darwin

Alfred Wegener

Isaac Newton

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16. What is "Pangaea"?

The name of the deepest ocean trench in the Pacific Ocean

The hypothetical supercontinent that existed approximately 335-175 million years ago before breaking apart into today's continents

The name of the Earth's largest current tectonic plate

The zone where all the world's major earthquake faults are located

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17. What is the deepest type of earthquake in terms of focus depth?

Deep focus earthquake (300-700 km deep)

Ultra-deep earthquake (below 700 km)

Intermediate focus earthquake (70-300 km deep)

Shallow focus earthquake (0-70 km deep)

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18. Which Pakistani city was almost completely destroyed in the 2005 Kashmir Earthquake?

Abbottabad

Balakot

Rawalpindi

Peshawar

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19. Is it possible to predict earthquakes accurately?

Yes — animal behaviour reliably predicts earthquakes several days in advance

No — despite decades of research, reliable short-term earthquake prediction (specific time, place, and magnitude) remains beyond current scientific capability

Yes — using satellite data, earthquakes can be predicted 24 hours in advance

Yes — scientists can predict earthquakes to within one hour of occurrence

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20. What is "tectonic plate theory" (plate tectonics)?

The scientific theory that the Earth's lithosphere is divided into large rigid plates that move relative to each other, driving earthquakes, volcanic activity, and mountain building

The theory that earthquakes are caused by changes in ocean tidal forces

The theory that the Earth's core is composed entirely of tectonic metals

The theory proposed by Newton explaining the movement of continents

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21. What is the difference between an "earthquake" and an "aftershock"?

An aftershock is a tremor that occurs only underwater

An aftershock is stronger than the main earthquake

An aftershock is an earthquake that occurs in a different country from the original earthquake

An aftershock is a smaller earthquake that occurs after the main earthquake in the same general area as the fault rupture

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22. What is "liquefaction potential" and which areas of Pakistan face high risk?

The risk of rivers overflowing their banks during earthquakes; most common in KP

The risk that underground water aquifers will be contaminated after earthquakes; most common in Punjab

The risk that dams will overflow during earthquakes; limited to Tarbela and Mangla dam areas

The risk that water-saturated soils will liquefy during earthquake shaking; highest in coastal Karachi and river delta areas of Sindh

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23. What is an "earthquake early warning system"?

A system that predicts earthquakes days before they occur

A public alarm system triggered by animal behaviour changes

A network of satellites that monitors tectonic plate movement

A system that detects P-waves from an earthquake already in progress and broadcasts alerts to areas where destructive S-waves and surface waves have not yet arrived

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24. What is "subduction" in plate tectonics?

The process where a plate breaks apart due to internal stress

The process where two continental plates collide and form mountains

The process where one tectonic plate slides beneath another into the Earth's mantle

The process where two plates move apart creating a rift valley

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25. What is an earthquake?

A sudden volcanic eruption beneath the ocean floor

A tidal wave caused by underwater landslides

The shaking or trembling of the Earth's surface caused by the sudden release of energy in the Earth's crust or upper mantle

The gradual sinking of land due to groundwater extraction

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26. What is the "Ring of Fire"?

A chain of active volcanoes surrounding the Pacific Ocean where approximately 90% of the world's earthquakes occur

The name of the zone around the equator where most earthquakes occur

A volcanic island chain in the Atlantic Ocean

A geological feature found only in Iceland and Hawaii

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27. What are "seismic waves"?

Ocean waves triggered by underwater earthquakes

Sound waves produced by the rumbling of an earthquake

Waves of energy that travel through the Earth's layers following an earthquake or explosion

Electromagnetic waves emitted by shifting tectonic plates

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28. What is the San Andreas Fault?

A volcanic fault line in Japan

A deep ocean trench in the Pacific Ocean near the Philippines

A subduction zone off the coast of South America

A major transform fault in California, USA, where the Pacific Plate and North American Plate slide past each other

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29. What is the 1906 San Francisco Earthquake significant for in the history of seismology?

It was one of the first major earthquakes to be extensively studied scientifically, leading to major advances in understanding fault systems and plate tectonics

It was the largest earthquake ever recorded in North America

It was the first earthquake ever recorded on a seismograph

It was the first earthquake to trigger a Pacific-wide tsunami

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30. What tectonic plates meet under Pakistan, making it highly earthquake-prone?

African, South American, and Antarctic plates

Australian, African, and Pacific plates

Eurasian, Indian, and Arabian plates

Pacific, Philippine, and North American plates

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31. Which country experiences the highest frequency of earthquakes in the world?

China

USA

Indonesia

Japan

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32. What is a "megathrust earthquake"?

An earthquake triggered by a large volcanic eruption

An earthquake caused by the collapse of a large underground cave system

The most powerful type of earthquake, occurring at subduction zones where one plate thrusts beneath another

A very large earthquake occurring deep within the Earth's mantle

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33. What was the deadliest earthquake in recorded history in terms of death toll?

2004 Indian Ocean Earthquake and Tsunami

2010 Haiti Earthquake

1976 Tangshan Earthquake, China

1556 Shaanxi Earthquake, China

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34. What is the Mercalli Intensity Scale?

A scale that predicts the probability of future earthquakes

A scale that measures the intensity of shaking and damage experienced at specific locations during an earthquake

A scale that measures the depth of the earthquake focus

A scale that measures the energy released by an earthquake

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35. What causes most earthquakes?

The movement of tectonic plates along fault lines

Changes in atmospheric pressure

Volcanic eruptions

Underground nuclear explosions

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36. What is the "Chaman Fault"?

An underwater fault line in the Arabian Sea

A fault line responsible for earthquakes in the Punjab plains

A major active left-lateral strike-slip fault system running through southwestern Pakistan and Afghanistan

A minor fault line running through the Thar Desert in Sindh

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37. What is the "seismic gap" theory?

The gap in seismograph coverage in remote areas of the world

The theory that there is always a gap of exactly 100 years between major earthquakes in the same region

The theory that earthquakes always occur in areas with no previous seismic history

The theory that sections of active fault zones that have not experienced a major earthquake for a long time may be "locked" and due for a future large earthquake

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38. Which was the most powerful earthquake ever recorded in history?

2004 Indian Ocean Earthquake, Indonesia (Mw 9.1)

1960 Valdivia Earthquake, Chile (Mw 9.5)

1964 Good Friday Earthquake, Alaska (Mw 9.2)

1906 San Francisco Earthquake, USA (Mw 7.9)

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39. What is the Richter Scale?

A logarithmic scale developed by Charles F. Richter in 1935 to measure the magnitude of earthquakes based on seismic wave amplitude

A scale measuring the depth of an earthquake's focus

A scale measuring the frequency of earthquakes in a region

A scale measuring the total damage caused by an earthquake

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40. What is the "moment magnitude" Mw 9.0 earthquake that struck Japan in 2011?

The Tohoku Earthquake — the most powerful earthquake ever recorded in Japan, which triggered a massive tsunami and the Fukushima nuclear disaster

The Osaka Earthquake of 2011

The Tokyo Earthquake of 1923

The Kobe Earthquake of 1995

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41. Which fault system is responsible for the formation of the Himalayas and poses the greatest seismic risk to northern Pakistan?

The Dead Sea Transform Fault in the Middle East

The Main Himalayan Thrust (MHT) and associated fault systems along the collision zone of the Indian and Eurasian plates

The Chaman Fault in Balochistan

The Makran Subduction Zone in the Arabian Sea

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42. What is the 2015 Nepal (Gorkha) Earthquake and its impact?

A Mw 9.0 earthquake that triggered a tsunami in the Bay of Bengal

A series of small tremors that caused Everest Base Camp to be evacuated

A Mw 5.5 earthquake that caused minor damage in Kathmandu

A Mw 7.8 earthquake on April 25, 2015, that killed approximately 8,964 people, injured over 21,000, and destroyed thousands of heritage sites including Dharahara Tower

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43. What is the 1935 Quetta Earthquake significant for in Pakistan's history?

It was one of the deadliest earthquakes in South Asian history, killing approximately 30,000-60,000 people in Quetta, Balochistan

It was the first earthquake ever recorded in Pakistan

It triggered a major tsunami in the Arabian Sea

It caused the Indus River to change course permanently

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44. What is "earthquake-resistant" or "seismic" building design?

Buildings designed to be completely undamaged by any earthquake

Construction techniques and design principles that allow buildings to flex and absorb seismic energy without collapsing, protecting human life

Buildings constructed entirely underground to avoid earthquake shaking

Buildings equipped with earthquake prediction instruments

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45. What is the "epicentre" of an earthquake?

The point on the Earth's surface directly above the focus (hypocentre)

The centre of a seismograph reading

The point inside the Earth where the earthquake originates

The most damaged area during an earthquake

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46. What is a "seismogram"?

The written or digital record of ground motion produced by a seismograph

A scientific journal dedicated to earthquake research

The official government report issued after a major earthquake

A prediction map of future earthquake zones

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47. What is the Makran Subduction Zone?

A fault line running through the Punjab plains of Pakistan

A volcanic zone in the Hindu Kush mountains of Pakistan

An area of frequent shallow earthquakes in Sindh province

An offshore subduction zone in the Arabian Sea where the Arabian Plate subducts beneath the Eurasian Plate, posing a tsunami risk to Pakistan's coastline

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48. What is "liquefaction" in the context of earthquakes?

The melting of rock during a major earthquake

The conversion of seismic energy into heat within the Earth

A phenomenon where saturated soil temporarily loses its strength and behaves like a liquid during earthquake shaking

The flooding caused by a tsunami following an earthquake

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49. What is the "focus" or "hypocentre" of an earthquake?

The point on the Earth's surface directly above where the earthquake originates

The point within the Earth where the earthquake originates and energy is first released

The point where seismic waves are first detected by a seismograph

The centre of the area most damaged by an earthquake

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50. What is the role of the "United States Geological Survey" (USGS) in earthquake monitoring?

USGS provides earthquake early warnings only to government agencies

USGS is responsible only for predicting volcanic eruptions, not earthquakes

USGS operates the National Earthquake Information Center (NEIC), which monitors and reports on earthquakes worldwide in real time

USGS only monitors earthquakes within the United States

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51. What were the deadliest earthquakes in the 21st century (post-2000)?

Both A and B are correct — all six rank among the deadliest 21st century earthquakes

2008 Sichuan (China), 2010 Haiti, and 2004 Indian Ocean Earthquake and Tsunami

Only the 2004 Indian Ocean Earthquake ranks among the deadliest in the 21st century

2003 Bam (Iran), 2005 Kashmir (Pakistan), and 2015 Nepal

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52. What is a "tsunami" and how are tsunamis caused by earthquakes?

An underwater earthquake that does not reach the surface

A coastal storm surge caused by hurricane-force winds during an earthquake

A series of large ocean waves generated when a submarine earthquake, landslide, or volcanic eruption displaces a large volume of ocean water

A very strong tidal current in coastal waters caused by the Moon's gravity

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53. What should a person do during an earthquake? (The recommended safety action)

Drop, Cover, and Hold On — get under a sturdy table or desk, protect head and neck

Stand in a doorway

Run to the nearest window and open it

Run outside immediately

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54. What is the Haiti Earthquake of 2010 and why was it so devastating?

A Mw 9.0 earthquake — the largest ever recorded in the Caribbean region

A Mw 8.5 earthquake — devastating because Haiti is near the Pacific Ring of Fire

A Mw 7.0 earthquake — devastating because of extreme poverty, poor building construction, high population density, and weak disaster response infrastructure in Haiti

A Mw 6.5 earthquake that was devastating only because it struck during a hurricane

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55. What are "P-waves" in seismology?

Push waves — surface waves that push buildings sideways

Perimeter waves — waves that travel only around fault line boundaries

Pressure waves — waves that travel only along the ocean floor

Primary waves — the fastest seismic waves that travel through both solid and liquid materials

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56. What is "induced seismicity"?

Earthquakes triggered by human activities such as deep fluid injection, reservoir filling, mining, or hydraulic fracturing (fracking)

Earthquakes felt only by sensitive instruments and not by humans

Earthquakes that induce (cause) volcanic eruptions

Earthquakes that are induced (triggered) by natural tectonic forces over geological time

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57. What was the 2004 Indian Ocean Earthquake and Tsunami?

An earthquake in the Indian Ocean that triggered volcanic eruptions across the region

A magnitude 7.5 earthquake that caused minor flooding in coastal India

A massive Mw 9.1-9.3 megathrust earthquake off the coast of Sumatra, Indonesia, that triggered a devastating tsunami killing approximately 230,000 people

A series of small earthquakes that caused a tsunami in the Arabian Sea

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58. What was the 2005 Kashmir Earthquake and what was its impact on Pakistan?

A series of small tremors felt across Punjab in October 2005

A devastating Mw 7.6 earthquake on October 8, 2005, that killed approximately 87,000 people in Pakistan and Azad Kashmir

A Mw 5.5 earthquake that caused minor damage in Azad Kashmir

A Mw 8.1 earthquake that triggered a tsunami in the Arabian Sea

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59. What is the "S-P time method" for locating an earthquake epicentre?

A method using the time difference between the arrival of P-waves and S-waves at seismograph stations to calculate distance to the epicentre

A method using satellite positioning to locate earthquakes

A method of predicting aftershock locations based on stress patterns

A method measuring the speed of surface waves to determine earthquake location

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60. What is the difference between "magnitude" and "intensity" of an earthquake?

They are the same measurement expressed in different units

Magnitude measures the total energy released at the source; intensity measures the strength of shaking experienced at a specific location

Magnitude is measured only at sea; intensity is measured only on land

Magnitude applies to large earthquakes; intensity applies to small ones

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61. What are "Love waves" and "Rayleigh waves" in seismology?

Two types of tsunami waves named after their discoverers

Two types of P-waves with different frequencies

Two types of surface waves that travel along the Earth's surface and cause most of the ground shaking and damage during an earthquake

Two types of body waves that travel through the Earth's interior

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