08 January 2026 - Daily CUrrent Affairs Updates

GS–1 | PHYSICAL GEOGRAPHY / VOLCANOLOGY

1. Popocatépetl Volcano

Subtopic: Stratovolcanoes, Plate Tectonics & Volcanic Hazards

Value Addition:

• Meaning of Name:

  • “Popocatépetl” means “Smoking Mountain” in the Aztec Nahuatl language, indicating persistent activity.

• Location:

  • Central Mexico, about 72 km southeast of Mexico City.

  • Lies along the border of México and Puebla states.

• Geological Setting:

  • Part of the Trans-Mexican Volcanic Belt.

  • Formed due to subduction of the Cocos Plate beneath the North American Plate.

• Volcano Type:

  • Steep-sided stratovolcano, built from alternating layers of lava, ash, and pyroclastic material.

• Height:

  • ~5,452 m, making it one of Mexico’s highest peaks.

• Volcanic Activity:

  • One of the most active volcanoes in Mexico.

  • Documented eruptions since 1519.

• Recent Scientific Advance:

  • First-ever 3D imaging of the internal structure, improving understanding of magma chambers and eruption pathways.

• Global Risk Context:

  • Considered among the most dangerous volcanoes in the Ring of Fire due to dense nearby population.

Subject Analysis:

• High-yield GS-1 topic linking plate tectonics, volcanic landforms, and disaster risk.

• Useful for prelims on Ring of Fire, stratovolcano characteristics, and hazard mapping.

GS–2 | PUBLIC HEALTH GOVERNANCE

2. Notifiable Diseases

Subtopic: Disease Surveillance, Epidemic Control & Legal Framework

Value Addition:

• Definition:

  • Diseases that are legally mandated to be reported to government authorities.

• Purpose of Notification:

  • Enables early outbreak detection, trend analysis, and rapid response.

• Legal Basis in India:

  • Epidemic Diseases Act, 1897 empowers governments to notify diseases.

• Decision Criteria:

  • National or international relevance.

  • Incidence at district/state/national level.

  • Severity and mortality potential.

  • Communicability and outbreak risk.

  • Potential for international spread.

• Reporting Obligations:

  • Mandatory reporting by medical practitioners and diagnostic laboratories.

  • States decide the list and reporting authority.

• Dynamic Nature:

  • List can be updated based on epidemiological needs.

• Common Examples:

  • Cholera, TB, AIDS, dengue, hepatitis, leprosy, meningitis, plague, measles.

• International Linkage:

  • WHO’s International Health Regulations (1969) mandate global disease reporting.

• Recent Development:

  • Delhi to declare rabies a notifiable disease to strengthen surveillance.

Subject Analysis:

• Core GS-2 topic on health governance and epidemic preparedness.

• Frequently tested for legal provisions and surveillance mechanisms.

GS–3 | SCIENCE & PHYSICS

3. Mpemba Effect

Subtopic: Thermodynamics, Phase Transitions & Heat Transfer

Value Addition:

• Definition:

  • Phenomenon where hot liquid freezes faster than cold liquid under certain conditions.

• Historical Roots:

  • Noted by Aristotle; named after Erasto Mpemba (1969).

• Proposed Explanations:

  • Microbubble formation enhances convection.

  • Evaporation removes heat more rapidly from warmer liquid.

  • Enhanced convection currents due to lower density of warm water.

  • Frost insulation slows cooling in initially colder water.

  • Changes in dissolved compounds affecting freezing behaviour.

• Recent Indian Research:

  • Supercomputer-based simulations captured the phenomenon in detail.

  • Found that the effect is not limited to water and can occur in other phase transitions.

Subject Analysis:

• High-quality GS-3 example of counter-intuitive physical phenomena.

• Useful for prelims on basic physics concepts and modern simulation techniques.

GS–3 | BIODIVERSITY & FAUNA

4. Double-Humped Bactrian Camel (Camelus bactrianus)

Subtopic: High-Altitude Adaptations & Endangered Species

Value Addition:

• Common Identity:

  • Known as Ladakh’s “silent warrior” due to endurance and historical utility.

• Geographical Distribution:

  • Native to Central Asia.

  • Major populations in Mongolia and the Gobi Desert.

  • In India, confined to Nubra Valley, Ladakh.

• Key Adaptations:

  • Two humps store fat, convertible to energy and water.

  • Thick seasonal coat for temperatures down to –40°C.

  • Sealable nostrils protect from dust and icy winds.

  • Broad padded feet act like snowshoes.

  • Can survive by consuming snow for hydration.

• Diet:

  • Omnivorous but mainly feeds on sparse vegetation.

• Conservation Status:

  • Critically Endangered (IUCN).

• Recent Highlight:

  • To debut at the 77th Republic Day parade.

Subject Analysis:

• Important GS-3 case of cold-desert biodiversity and adaptive evolution.

• Often asked in prelims for species-habitat associations.

GS–3 | DEFENCE TECHNOLOGY

5. Suryastra Rocket System

Subtopic: Indigenous Missile Systems & Modern Warfare

Value Addition:

• Nature:

  • India’s first indigenous universal multi-calibre rocket launcher.

• Developed By:

  • NIBE Limited (India) with Elbit Systems (Israel).

• Operational Capability:

  • Precision strikes at 150 km and 300 km.

  • Can engage multiple targets at different ranges simultaneously.

• Accuracy:

  • Circular Error Probable (CEP) < 5 metres during trials.

• Versatility:

  • Same platform can fire loitering munitions up to 100 km.

• Technology Base:

  • Built on Elbit’s Precise and Universal Launching System.

• Battlefield Features:

  • GPS + inertial navigation-based fire control.

  • Digital ballistic computation.

  • Shoot-and-scoot capability reduces counter-battery risk.

• Procurement:

  • Army contract worth ₹293 crore.

Subject Analysis:

• Strong GS-3 topic on defence indigenisation and precision strike capability.

• Relevant for questions on modern artillery systems.

GS–3 | BIODIVERSITY / HERPETOLOGY

6. Calamaria mizoramensis

Subtopic: New Species Discovery & Northeast Biodiversity

Value Addition:

• Taxonomic Status:

  • Newly discovered non-venomous reed snake.

• Discovery Location:

  • Mizoram, humid forested hills.

• Behaviour:

  • Nocturnal and semi-fossorial.

• Habitat Range:

  • Elevation 670–1,295 m.

  • Some sightings near human settlements.

• Physical Traits:

  • Small size, dark brown to black body.

  • Faint striping with yellow underside.

• Potential Distribution:

  • Likely presence in Manipur, Nagaland, Assam.

• About Reed Snakes:

  • Belong to genus Calamaria, family Colubridae.

  • Found in moist forests of South and Southeast Asia.

  • Feed on soft-bodied invertebrates.

Subject Analysis:

• Highlights India’s undocumented herpetofaunal diversity.

• GS-3 relevance for species discovery and conservation science.

GS–2 | INTERNATIONAL RELATIONS / SECURITY

7. Justice Mission 2025 (China)

Subtopic: Military Exercises, Taiwan Issue & Regional Security

Value Addition:

• Nature:

  • Large-scale inter-service military exercise by China around Taiwan.

• Forces Involved:

  • Army, Navy, Air Force, missile and artillery units.

• Operational Focus:

  • Sea and air combat patrols.

  • Joint seizure of battlefield dominance.

  • Simulated blockade of key ports and strategic areas.

• Strategic Objective:

  • Demonstrate all-domain deterrence beyond island chains.

  • Signal opposition to Taiwan independence and external interference.

• Geopolitical Context:

  • China claims sovereignty over Taiwan.

  • Exercise coincides with large US arms sales to Taiwan (>$10 billion).

Subject Analysis:

• High-probability GS-2 topic on Indo-Pacific security dynamics.

• Useful for mains on China–Taiwan relations and great-power rivalry.