19 Aug 2026 - "Daily Current Affairs" Updates

Medak Fort

Art & Culture | Medieval History | Telangana

WHY IN NEWS: The Department of Posts launched a postal cover and postal stamp on the historic Medak Fort.

IN ONE LINE: Medak Fort is a 12th-century hill fort in Telangana built by the Kakatiya ruler Pratapa Rudra and later used by the Qutub Shahis.

Location and historical background

• Medak Fort is located in Medak town of Telangana.

• It was built in the 12th century by the Kakatiya ruler Pratapa Rudra.

• Its original Telugu name was Methuku Durgam.

• It served as an important military command post for the Kakatiyas and was later used by the Qutub Shahis.

What should you remember about the fort?

• Area: spread over more than 100 acres.

• Elevation: approximately 90 metres above ground level.

• Structures inside include a small lake, barracks, warehouses and an 11-foot-long cannon dating to the 17th century CE.

• The fort also contains granaries used for storing food and supplies.

• A 17th-century mosque inside the fort was built by the Qutub Shahis.

Three gateways

• Prathama Dwaram.

• Simha Dwaram or Lion Gate: decorated with sculptures of two snarling lions.

• Gaja Dwaram or Elephant Gate: features sculptures of two interlocked elephants on either side of the entrance.

Gandabherundam emblem

• The main entrance displays the double-headed Gandabherundam.

• The emblem was the royal emblem of the Vijayanagara Empire and is associated with Sri Krishnadevaraya.

MEMORY LOCK: Medak Fort | Telangana | 12th century | Kakatiya ruler Pratapa Rudra | Methuku Durgam | later Qutub Shahis | 3 gateways | Gandabherundam | 17th-century cannon + mosque

CHECK YOUR RECALL

1. Who built Medak Fort, and what was its original name?

2. Name the three major gateways of the fort.

3. Which double-headed emblem appears at the main entrance?

Earthquake Swarm

Physical Geography | Seismology

WHY IN NEWS: Maharashtra experienced a series of small earthquakes that seismologists described as an earthquake swarm.

IN ONE LINE: An earthquake swarm is a cluster of multiple earthquakes of broadly comparable intensity occurring in a limited area without one dominant main shock.

How is a swarm different from a normal earthquake sequence?

• A swarm consists of multiple earthquakes occurring within a limited geographic area over a relatively short period.

• Most events are of comparable magnitude or intensity.

• Unlike a typical mainshock-aftershock sequence, there is no single dominant main shock.

• A swarm may include dozens, hundreds or even thousands of low-intensity earthquakes.

• Its duration may range from days and weeks to months or even years.

• Seismic energy is released gradually through a series of smaller tremors rather than through one major earthquake.

Where are earthquake swarms commonly seen?

• Active geothermal regions.

• Volcanic zones.

• Tectonically active areas.

Three important causes

• Fluid movement: underground water or other fluids moving through cracks and faults can induce fault slip and trigger small earthquakes.

• Active volcanism: movement of magma through the crust can create stress, with earthquakes occurring near or along magma-filled fractures.

• Slow-slip events: gradual fault movement over weeks, months or years can release stress and trigger clusters of small earthquakes.

Quick identification

• Similar-magnitude events.

• Localised geographic concentration.

• No clear mainshock.

• Highly variable duration.

MEMORY LOCK: Earthquake swarm = many comparable tremors | localised | no dominant mainshock | can last days to years | fluid movement + volcanism + slow-slip events

CHECK YOUR RECALL

1. What is the defining difference between an earthquake swarm and a mainshock-aftershock sequence?

2. Name three geological processes associated with earthquake swarms.

3. How long can an earthquake swarm last?

South Asian Free Trade Area (SAFTA)

International Relations | Regional trade | SAARC

WHY IN NEWS: The Directorate of Revenue Intelligence dismantled a network allegedly importing South-East Asian areca nuts into India while falsely declaring them as Bangladeshi origin to claim concessional duty benefits under SAFTA.

IN ONE LINE: SAFTA is the free-trade arrangement of SAARC, in force since 2006, designed to promote trade liberalisation and economic integration among South Asian member countries.

What is SAFTA?

• SAFTA is the free-trade arrangement of the South Asian Association for Regional Cooperation (SAARC).

• It came into force in 2006.

• It succeeded the SAARC Preferential Trading Arrangement (SAPTA), signed in 1993.

• Its broad purpose is to promote regional economic integration and expand trade among South Asian countries.

Member countries

• Afghanistan

• Bangladesh

• Bhutan

• India

• Maldives

• Nepal

• Pakistan

• Sri Lanka

Core objectives

• Trade liberalisation: remove barriers and facilitate cross-border movement of goods.

• Economic cooperation: strengthen mutual trade and economic cooperation.

• Fair competition: create conditions for fair competition and equitable benefits.

• Dispute resolution: provide mechanisms for implementation, administration and settlement of disputes.

• Regional integration: create a framework for deeper economic cooperation among South Asian countries.

Special provisions for LDCs

• SAFTA recognises the need for special and differential treatment for Least Developed Countries in the region.

• Its approach seeks to ensure that economically less-developed members benefit equitably from trade liberalisation.

• It takes into account differences in levels and patterns of economic development.

MEMORY LOCK: SAFTA = SAARC free-trade arrangement | in force 2006 | replaced SAPTA (1993) | 8 members | trade liberalisation + fair competition + dispute resolution | special treatment for LDCs

CHECK YOUR RECALL

1. What did SAFTA replace, and when did SAFTA come into force?

2. Name all eight SAFTA member countries.

3. Why does SAFTA contain special provisions for LDCs?

Nancy Grace Roman Space Telescope

Space | Astronomy | Dark energy, dark matter & exoplanets

WHY IN NEWS: NASA's Nancy Grace Roman Space Telescope is set to begin its journey to space on 30 August, according to the uploaded source.

IN ONE LINE: The Roman Space Telescope is NASA's next flagship orbital observatory, designed to study dark energy, dark matter, exoplanets and infrared astrophysics from the Sun-Earth L2 region.

Mission focus

• It is NASA's next flagship orbital observatory.

• Its major scientific focus areas are dark energy, dark matter and exoplanets.

• It will also support infrared astrophysics and provide a deep, detailed view of the central Milky Way.

• It will operate around the Second Sun-Earth Lagrange Point (L2), approximately 1.5 million km from Earth.

• It is named after Nancy Grace Roman, NASA's first Chief of Astronomy, often called the “Mother of Hubble.”

What will it investigate?

• Dark energy: improve understanding of the force associated with the accelerating expansion of the universe.

• Exoplanets: monitor hundreds of millions of stars for brightness changes that reveal planets.

• Cosmic objects: search for distant stars, isolated black holes and small icy objects in the outer Solar System.

• Cosmic mapping: observe light from billions of galaxies to study the structure and evolution of the universe.

Wide Field Instrument (WFI)

• A 300-megapixel infrared camera.

• Field of view is approximately 100 times larger than Hubble's infrared instrument.

• Designed to survey vast areas of the sky efficiently.

• Expected to measure light from around one billion galaxies.

• Its microlensing survey of the inner Milky Way is expected to discover about 2,600 exoplanets.

Coronagraph Instrument

• An advanced technology demonstration.

• Designed for high-contrast imaging and spectroscopy of nearby exoplanets.

• Suppresses bright starlight to enable direct observation of orbiting planets.

• Helps study the atmospheres and characteristics of individual exoplanets.

Galactic Bulge Time-Domain Survey

• Focuses on the dense central region of the Milky Way.

• Monitors stellar variability and transient events such as microlensing.

• Such events can reveal hidden planets and compact objects.

MEMORY LOCK: Roman Space Telescope | NASA flagship | dark energy + dark matter + exoplanets | L2 ~1.5 million km | WFI 300 MP, ~100x Hubble IR field | ~1 billion galaxies | ~2,600 exoplanets | Coronagraph

CHECK YOUR RECALL

1. Which three headline scientific questions will the Roman Telescope address?

2. Where will it operate?

3. Differentiate the roles of the WFI and Coronagraph Instrument.