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 "induced seismicity"?

Earthquakes that induce (cause) volcanic eruptions

Earthquakes felt only by sensitive instruments and not by humans

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

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

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

Submarine waves — waves that travel only under the ocean

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

Shock waves — waves that cause tsunamis

Surface waves — the slowest seismic waves

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

Magnitude applies to large earthquakes; intensity applies to small ones

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

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

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4. What is "Pangaea"?

The name of the Earth's largest current tectonic plate

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

The name of the deepest ocean trench in the Pacific Ocean

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

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

Being the first earthquake recorded in South America

Generating the largest tsunami ever recorded in the Pacific Ocean

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

Being the earthquake that prompted the invention of the Richter Scale

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

The largest earthquake ever recorded in the Atlantic Ocean

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 first earthquake ever recorded in Europe, measuring Mw 9.0

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7. 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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8. What is "liquefaction" in the context of earthquakes?

The flooding caused by a tsunami following an earthquake

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

The melting of rock during a major earthquake

The conversion of seismic energy into heat within the Earth

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9. What is a "megathrust earthquake"?

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

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

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

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

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

An aftershock is a tremor that occurs only underwater

An aftershock is stronger than the main earthquake

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

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

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

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

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

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

It caused the Indus River to change course permanently

It triggered a major tsunami in the Arabian Sea

It was the first earthquake ever recorded in Pakistan

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

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14. What causes most earthquakes?

The movement of tectonic plates along fault lines

Underground nuclear explosions

Volcanic eruptions

Changes in atmospheric pressure

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

Abbottabad

Peshawar

Balakot

Rawalpindi

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

1976 Tangshan Earthquake, China

2010 Haiti Earthquake

1556 Shaanxi Earthquake, China

2004 Indian Ocean Earthquake and Tsunami

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

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

The theory proposed by Newton explaining the movement of continents

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

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

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

Two types of tsunami waves named after their discoverers

Two types of P-waves with different frequencies

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

An area of frequent shallow earthquakes in Sindh province

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20. 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 Mw 5.5 earthquake that caused minor damage in Azad Kashmir

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

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

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

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

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

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

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

A Mw 5.5 earthquake that caused minor damage in Kathmandu

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

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

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

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

A system that predicts earthquakes days before they occur

A network of satellites that monitors tectonic plate movement

A public alarm system triggered by animal behaviour changes

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 two plates move apart creating a rift valley

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

The process where two continental plates collide and form mountains

The process where a plate breaks apart due to internal stress

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25. What is the Mercalli Intensity Scale?

A scale that measures the energy released by an earthquake

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

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

Deep focus earthquake (300-700 km deep)

Intermediate focus earthquake (70-300 km deep)

Shallow focus earthquake (0-70 km deep)

Ultra-deep earthquake (below 700 km)

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

Buildings equipped with earthquake prediction instruments

Buildings constructed entirely underground to avoid earthquake shaking

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

Buildings designed to be completely undamaged by any earthquake

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28. 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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29. What is the Richter Scale?

A scale measuring the frequency of earthquakes in a region

A scale measuring the depth of an earthquake's focus

A scale measuring the total damage caused by an earthquake

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

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

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

It was the largest earthquake ever recorded in North America

It was the first earthquake ever recorded on a seismograph

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

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

A magnitude 7.5 earthquake that caused minor flooding in coastal India

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

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

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

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

1906 San Francisco Earthquake, USA (Mw 7.9)

1964 Good Friday Earthquake, Alaska (Mw 9.2)

2004 Indian Ocean Earthquake, Indonesia (Mw 9.1)

1960 Valdivia Earthquake, Chile (Mw 9.5)

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

A satellite system used to monitor tectonic plate movement

A device that predicts earthquakes before they occur

A scale used to classify the damage caused by an earthquake

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

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

Alfred Wegener

Isaac Newton

Harry Hess

Charles Darwin

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

A scale that measures only the surface damage of earthquakes

A European alternative to the American Richter Scale

A scale measuring the moment (time) an earthquake lasts

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

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36. What is the "Ring of Fire"?

A volcanic island chain in the Atlantic Ocean

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

A geological feature found only in Iceland and Hawaii

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

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

A method using satellite positioning to locate earthquakes

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 measuring the speed of surface waves to determine earthquake location

A method of predicting aftershock locations based on stress patterns

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38. What is a "seismogram"?

A prediction map of future earthquake zones

The official government report issued after a major earthquake

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

A scientific journal dedicated to earthquake research

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

Run outside immediately

Stand in a doorway

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

Run to the nearest window and open it

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

The centre of a seismograph reading

The most damaged area during an earthquake

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

The point inside the Earth where the earthquake originates

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

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

The Dead Sea Transform Fault in the Middle East

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

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

USGS is responsible only for predicting volcanic eruptions, not earthquakes

USGS provides earthquake early warnings only to government agencies

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44. What is the study of earthquakes called?

Geology

Seismology

Tectonics

Volcanology

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

Eurasian, Indian, and Arabian plates

African, South American, and Antarctic plates

Pacific, Philippine, and North American plates

Australian, African, and Pacific plates

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46. Is it possible to predict earthquakes accurately?

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

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 — scientists can predict earthquakes to within one hour of occurrence

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

An international body that monitors earthquakes globally from Pakistan

A research university in Islamabad dedicated to geology studies

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

A private organisation that sells earthquake insurance in Pakistan

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

A Mw 6.0 earthquake that caused minor damage in Tokyo

The largest earthquake ever recorded in Asia, measuring Mw 9.5

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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49. What are "seismic waves"?

Ocean waves triggered by underwater earthquakes

Electromagnetic waves emitted by shifting tectonic plates

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

Sound waves produced by the rumbling of an earthquake

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50. What is the "Chaman Fault"?

A fault line responsible for earthquakes in the Punjab plains

An underwater fault line in the Arabian Sea

A minor fault line running through the Thar Desert in Sindh

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

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51. What is a "fault" in geology?

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

A deep ocean trench formed by tectonic plate movement

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

A volcanic vent that releases magma during earthquakes

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

The Kobe Earthquake of 1995

The Tokyo Earthquake of 1923

The Osaka Earthquake of 2011

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

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

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

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

The centre of the area most damaged by an earthquake

The point where seismic waves are first detected by a seismograph

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54. What is an earthquake?

A sudden volcanic eruption beneath the ocean floor

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

A tidal wave caused by underwater landslides

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55. What is a "foreshock"?

A strong earthquake that predicts a volcanic eruption

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

A tremor felt only at the epicentre before the main shaking

The first wave of a tsunami to reach shore

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

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

Push waves — surface waves that push buildings sideways

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

Indonesia

Japan

USA

China

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

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

An underwater earthquake that does not reach the surface

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

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

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

Mountain, Valley, and Ocean boundaries

Magma, Lava, and Rock boundaries

Hot, Cold, and Neutral boundaries

Convergent, Divergent, and Transform boundaries

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

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

The zoning of land around active volcanoes to restrict development

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

The zoning of coastal areas to manage tsunami risk only

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