UPSC Current Affairs 4 April 2026

 

Why in News?

United Nations Interim Force in Lebanon (UNIFIL) is recently in the news because of On April 3, 2026, an explosion at a UN site near Al-Adaisseh injured three more peacekeepers, leaving two in serious condition.

 

Establishment & Purpose

• Founded: March 1978 by UN Security Council Resolutions 425 and 426.

• Original Goals:

  • Confirm the withdrawal of Israeli forces from southern Lebanon.

  • Restore international peace and security.

  • Assist the Lebanese government in restoring authority in the area. 

The 2006 Mandate (Resolution 1701) 

Following the 2006 Lebanon War, UNIFIL's role was significantly expanded to: 

• Monitor the cessation of hostilities.

• Support the Lebanese Armed Forces (LAF) in deploying throughout the south.

• Ensure the area between the Blue Line (border) and the Litani River is free of unauthorized armed personnel and weapons (primarily Hezbollah).

• Assist in humanitarian access for civilians and the return of displaced persons. 

Force Composition & Leadership

• Current Strength: Approximately 7,500 peacekeepers (down from over 10,000 in 2024 due to planned reductions).

• Contributors: Around 47–50 countries provide troops.

• Top Contributors (2026): Italy (~774 personnel), Indonesia (~756), Spain (~657), and India (~642).

• Maritime Task Force: Includes a naval component to help the Lebanese Navy prevent illegal arms smuggling by sea. 

Key Geography: The Blue Line

• The Blue Line is the 120 km "line of withdrawal" published by the UN in 2000 to verify the pullout of Israeli forces.

• It is not an official international border but serves as the de facto boundary that UNIFIL patrols to maintain the ceasefire. 

The Path to Withdrawal

• Termination Date: The current mandate expires on December 31, 2026.

• Transition Plan: 2027 is designated for an "orderly and safe drawdown," handing over full security responsibility to the Lebanese Armed Forces.

• Political Context: The wind-down was heavily pushed by the U.S. and Israel, who argued the force failed to disarm Hezbollah as required by Resolution 1701.

 

 

Why in News?

Earthquake Lights (EQL) are recently in the news following a series of seismic events in the Aegean Sea (near Turkey and Greece) in late March and early April 2026, where rare "glowing vertical beams" and "floating pillars" were captured on social media. 

 

Appearance and Timing

• Forms: Can appear as flashes, glowing spheres, vertical beams, or sheet lightning.

• Colours: Most often white, blue, or iridescent, though multicoloured hues (red, yellow) have been reported in quakes like Morocco (2023).

• Timing: They can occur weeks before, during, or immediately after a quake. 

Scientific Causes

• P-Holes (Positive Holes): Intense pressure in the crust breaks "peroxy bonds" in rocks like basalt and gabbro. This releases electrical charges that travel to the surface and ionise the air, creating glowing plasma.

• Piezoelectric Effect: Compression of rocks containing quartz generates powerful electric fields.

• Frictional Discharge: Voltage is generated when tectonic layers rub together, similar to static electricity (triboluminescence).

• Rayleigh Scattering: Recent studies (2025) suggest the blue colour in these flashes is often due to light scattering off nitrogen molecules, similar to why the sky is blue. 

Where they Occur?

• Rift Zones: Approximately 97% of cases occur at or near rift zones where tectonic plates are pulling apart.

• Fault Conduits: Straight, vertical faults act like "high-speed conduits" or "express elevators" for the electrical charge to reach the surface.

• Global Hotspots: Frequent sightings occur in Turkey, Japan, Mexico, Italy, and New Zealand. 

Potential as Early Warning 

• Predictive Value: Because these lights sometimes appear hours or days before the shaking starts, geophysicists hope to use them—in combination with satellite data—as a vital early-warning indicator for impending quakes.

 

 
Why in News?

On April 2, 2026, the Government of Goa and the Cochin Port Authority signed agreements to adopt the SAMPANN platform for their pension disbursements ('Platform as a Service').

 
What is SAMPANN?

• Full Name: System for Accounting and Management of Pension.

• Developer: Office of the Controller General of Communication Accounts (CGCA), Department of Telecommunications (DoT).

• Launch Date: Dedicated to the nation by PM Narendra Modi on December 29, 2018.

• Objective: To provide a seamless, end-to-end digital solution for the entire pension lifecycle—from processing and sanctioning to direct disbursement. 

Key Features

• Direct Benefit Transfer (DBT): Pensions are credited directly into bank accounts, eliminating intermediaries and reducing commission costs for the government.

• Single Window System: A unified portal for retirees to track their application status, view monthly statements, and download e-Pension Payment Orders (e-PPOs).

• Digital Life Certificate (DLC): Integration with the Jeevan Pramaan portal allows pensioners to submit life certificates online via biometric verification.

• Grievance Redressal: An online module to lodge complaints, track resolutions in real-time, and receive updates via SMS alerts.

• Cloud-Based Architecture: Uses a flexible design that allows for rapid scaling to accommodate other government departments. 

Impact & Significance

• Government Savings: As of late 2021, the system saved the government approximately ₹11.5 Crore annually by cutting out bank/post office commissions for telecom pensioners.

• User Base: Originally serving DoT, BSNL, and MTNL retirees, it is now evolving into a national infrastructure for public sector pension management.

• Ease of Living: Eliminates the need for elderly citizens to make multiple physical visits to offices or banks. 

 

 
Why in News?
As of April 1, 2026, the Reserve Bank of India (RBI) has strictly prohibited banks (Authorised Dealers) from offering NDD contracts involving the Indian Rupee (INR) to both residents and non-residents.
 
About

• Curbing Speculation: The move aims to stop "speculative games" and arbitrage trades that were putting extreme pressure on the Rupee, which recently fell near the ₹95/$ mark.

• Rupee Recovery: Following the announcement, the Rupee saw a sharp "relief rally," appreciating by over ₹1.70 to reach around ₹93.10/$ as speculative offshore positions were unwound.

• New Net Position Caps: Banks must now cap their "net open rupee positions" at $100 million, a significant tightening from previous limits based on bank capital. 

How They Work?

• Cash Settlement: At maturity, the "profit or loss" is calculated based on the difference between the contracted rate and the prevailing spot rate.

• Formula: Cash Flow = (NDF Rate - Spot Rate) × Notional Amount.

• No Delivery: Because the actual currency (like the Rupee) never changes hands, these trades often occur offshore in hubs like Singapore, London, or New York, outside the direct reach of local regulators. 

New RBI Restrictions (Effective Immediately) 

• No Rebooking: Banks can no longer allow users to rebook (cancel and re-enter) any forex derivative contracts, whether deliverable or non-deliverable.

• Related-Party Ban: Banks are barred from entering into INR derivative contracts with related entities (e.g., subsidiaries), preventing them from shifting losses within the same corporate group.

• Focus on "Genuine Hedging": Only deliverable contracts (where actual currency is exchanged) are now permitted for legitimate business needs, provided they aren't used to offset offshore NDD positions. 

Risks and Issues

• Market Distortion: NDD markets can distort "price discovery," as offshore traders' expectations may force the onshore Rupee value to drop even if domestic fundamentals are strong.

• Arbitrage: Traders often exploit the price gap between the onshore market (India) and the offshore NDD market, a practice the RBI is now actively shutting down to stabilise the currency.

• Counterparty Risk: Since NDDs are "Over-the-Counter" (OTC) and not traded on a formal exchange, participants face the risk that the other party might default on the cash payment. 

 

 
Why in News?
Newcastle Disease (ND) is a highly contagious and often fatal viral disease affecting birds, particularly domestic poultry. It is currently making headlines due to a significant and rapid spread across Europe, leading to the culling of millions of birds. 
 
Disease Overview

• Caused by virulent strains of avian paramyxovirus type 1 (APMV-1), part of the Paramyxoviridae family.

• Highly contagious; spreads via direct contact, aerosols, contaminated feed/equipment, or wild birds.

• Affects over 250 bird species, domestic and wild; poultry (chickens, turkeys) most severely impacted.

Forms and Severity

• Lentogenic (mild): Common, low mortality, mainly respiratory issues.

• Mesogenic (moderate): Higher virulence, affects egg production.

• Velogenic (very virulent, or exotic ND): Fatal, up to 100% mortality in chickens; systemic with respiratory, nervous, and digestive signs.

Symptoms

• Respiratory: Sneezing, coughing, nasal discharge, gasping.

• Nervous: Tremors, head twisting, paralysis, circling.

• Digestive: Greenish diarrhea, lack of appetite.

• Other: Sudden death, ruffled feathers, swollen eyes/head, drop in egg production.

Transmission and Impact

• Incubation: 2-15 days, typically 5-6.

• Not a major human health risk; rare mild conjunctivitis in handlers without PPE.

• Economic devastation via mass culling; reportable to WOAH in highly pathogenic forms.

Prevention and Control

• Vaccination: Live or inactivated vaccines reduce clinical signs but not infection.

• Biosecurity: Quarantine, disinfection, restrict wild bird contact.

• Diagnosis: Lab confirmation essential (similar to avian influenza).

• Treatment: None; supportive care only; slaughter in outbreaks.

 

 
Why in News?
As of April 1, 2026, the Indian government has lowered the threshold for GAAR application. Tax authorities can now scrutinize "aggressive tax planning" for transactions starting from ₹2 crore (reduced from the previous ₹3 crore limit).
 
Primary Objective

• To distinguish between Tax Planning (legal) and Tax Avoidance (legal but unethical/contrived).

• To prevent the loss of tax revenue through "Impermissible Avoidance Arrangements" (IAA). 

What Qualifies as an "Avoidance Arrangement"?
A transaction can be flagged under GAAR if it meets any of the following criteria: 

• Abuse of Law: It is not conducted at Arm’s Length (the price is not what independent parties would pay).

• Lacks Commercial Substance: The transaction has no real business purpose other than saving tax.

• Misuse of Treaties: Using "Treaty Shopping" to take advantage of Double Taxation Avoidance Agreements (DTAA) without having a real presence in that country.

• Contrived Rights: Creating rights or obligations that would not normally be created between people acting in good faith. 

Safe Harbours (Exemptions)
Not all transactions are scrutinized. GAAR generally does not apply to: 

• Threshold: Transactions involving a tax benefit below ₹2 crore (as per 2026 rules).

• FPIs: Foreign Portfolio Investors who do not claim treaty benefits and are registered with SEBI (subject to specific conditions).

• Historical Dates: Arrangements entered into before April 1, 2017, are generally "grandfathered" (protected). 

The GAAR Process in India 

1. Notice: A Tax Officer (AO) identifies a suspicious arrangement.

2. Approval: The AO must seek approval from the Principal Commissioner or Commissioner of Income Tax.

3. Reference: If the Commissioner agrees, the case is referred to an Approving Panel.

4. The Panel: Chaired by a high court judge, the panel hears the taxpayer’s side before giving a final direction. 

Key Difference: GAAR vs. SAAR

Feature  GAAR (General Anti-Avoidance Rules) SAAR (Specific Anti-Avoidance Rules) Scope Broad and flexible; covers any new trick. Specific; covers known loopholes (Transfer Pricing). Control "Substance over Form." Literal interpretation of specific rules. Usage Used as a "Last Resort." Used as the "First Line of Defence."

 
 
 

 
Why in News?
The Ministry provided a formal update in Parliament (Lok Sabha) regarding the scheme's progress, confirming that the National Small Industries Corporation (NSIC) is actively conducting 150 awareness workshops in Tier-2 and Tier-3 cities.
 
Core Objective

• Digital Empowerment: To help 5 lakh Micro and Small Enterprises (MSEs) transition from traditional to digital commerce by integrating them into the ONDC network.

• Inclusive Growth: A specific mandate ensures that 50% of the beneficiaries (2.5 lakh enterprises) are women-owned MSEs. 

Key Benefits for MSMEs

• ONDC Integration: Direct access to a government-backed network that provides ready-made online storefronts, reducing the need for small businesses to build their own e-commerce platforms.

• Digital Cataloguing: Financial and technical assistance for creating digital product catalogues, including the use of AI-based tools to speed up the process.

• Logistics & Payments: Integrated support for order fulfilment, secure online payments, and transport logistics.

• Reduced Costs: Lower commissions compared to traditional e-commerce giants, making it viable for even the smallest micro-enterprises to sell online. 

Eligibility & Administration

• Target Group: All Udyam-registered Micro and Small Enterprises in both the manufacturing and service sectors.

• Exclusion: Medium Enterprises are generally not eligible for benefits under this specific initiative.

• Implementing Agency: The National Small Industries Corporation (NSIC), a Mini Ratna CPSE under the Ministry of MSME. 

Six Strategic Pillars of the Initiative

1. Formalization: Helping businesses enter the formal economy to access credit more easily.

2. Market Access: Expanding customer reach through digital marketplaces.

3. Technology: Leveraging modern tools to increase productivity.

4. Skill Development: Specialized training in digital marketing and e-commerce operations.

5. Globalizing Traditions: Pushing traditional industries like Khadi and Coir into global markets.

6. Empowerment: Focused support for women and artisans.

 

 
Why in News?
Artemis II is recently making global headlines as NASA successfully launched the mission on April 1, 2026, marking the first time humans have journeyed toward the Moon in over 50 years. The four-person crew is currently in the middle of their 10-day journey, having recently completed the critical burn to leave Earth's orbit.
 
About

• Historic Launch: The mission successfully lifted off from Kennedy Space Center on April 1, 2026, at 6:35 p.m. EDT.

• Deep Space Record: On Monday, April 6, 2026, the crew is expected to break the all-time human distance record from Earth (previously held by Apollo 13), reaching over 252,700 miles (406,700 km).

• Mission Progress: As of April 4, the crew has successfully performed the Translunar Injection (TLI) burn, moving them out of Earth's orbit and onto a direct path for a lunar flyby.

• First Photos: NASA has just released the first high-resolution images of Earth captured by the crew from deep space.

The Crew
The mission carries a diverse four-member team, each making history: 

• Reid Wiseman (Commander): NASA veteran and mission leader.

• Victor Glover (Pilot): The first person of colour to venture beyond low-Earth orbit.

• Christina Koch (Mission Specialist): The first woman to embark on a lunar mission.

• Jeremy Hansen (Mission Specialist): Representing the Canadian Space Agency (CSA), he is the first non-U.S. citizen to travel to the Moon's vicinity. 

Technical Components

• Rocket: The Space Launch System (SLS), the most powerful rocket ever built by NASA.

• Spacecraft: The Orion Capsule (named Integrity by the crew), designed to sustain life in deep space.

• Service Module: The European Service Module (ESM), built by Airbus for the ESA, provides power, water, and air to the crew. 

Mission Objectives

• Systems Validation: Testing life-support, communication, and navigation systems with humans on board for the first time in deep space.

• Manual Piloting: The crew successfully tested manual handling of the spacecraft in Earth orbit using the rocket's upper stage as a target.

• Radiation Science: Carrying experiments like AVATAR (organ-on-a-chip) to study the biological effects of deep-space radiation on human health. 

Mission Timeline (April 2026)

• April 1: Successful launch and entry into Earth orbit.

• April 2: Translunar Injection (TLI) burn; the crew left Earth's orbit.

• April 6: Lunar Flyby; Orion will pass approximately 4,600 miles (7,400 km) behind the far side of the Moon.

• April 10: Planned splashdown in the Pacific Ocean off the coast of San Diego. 

 

 
Why in News?
INS Aridhaman, India's third Arihant-class nuclear-powered ballistic missile submarine (SSBN), was commissioned into the Indian Navy on April 3, 2026. Commissioned by Defence Minister Rajnath Singh, this advanced vessel boosts India's nuclear triad and maritime deterrence. It follows the induction of INS Arihant (2016) and INS Arighaat (2024)
 
Design and Construction

• Class: Arihant-class (SSBN).

• Project: Developed under the secretive Advanced Technology Vessel (ATV) project.

• Build Site: Constructed at the Ship Building Centre (SBC) in Visakhapatnam.

• Launch: It was quietly launched in November 2017 and has since undergone extensive outfitting and trials. 

Technical Specifications

• Propulsion: Powered by an indigenous 83 MW pressurized light-water reactor (PWR) fuelled by enriched uranium.

• Size: It is significantly larger and more advanced than its predecessor, INS Arihant, with a displacement of approximately 7,000 tonnes.

• Speed: Capable of reaching speeds over 24 knots (44 km/h) when submerged.

• Stealth: Features advanced quieting technologies and an indigenous sonar suite (USHUS) to remain undetected by enemy anti-submarine warfare (ASW) units. 

Weaponry and Firepower

• Vertical Launch System (VLS): Equipped with 8 launch tubes, doubling the capacity of INS Arihant.

• Missile Loadout:

  • K-15 (Sagarika): Can carry up to 24 of these short-range missiles (750 km range).

  • K-4: Can carry up to 8 of these long-range missiles (3,500 km range), allowing it to target deep inland from safe waters.

• Torpedoes: Equipped with 533mm torpedo tubes for self-defence against enemy ships and submarines. 

Strategic Significance

• Nuclear Triad: Completes India’s ability to fire nuclear weapons from Land, Air, and Sea.

• Second-Strike Capability: Because a submarine is difficult to track, it ensures India can retaliate even if its land-based silos are destroyed in a first strike.

• Indigenization: Represents a massive leap for Atmanirbhar Bharat in high-end defence technology, as India is one of only six countries to operate nuclear-powered submarines. 

 

 
Why in News?
Helium gas is currently making global headlines due to a severe supply crisis triggered by geopolitical conflict in the Middle East, specifically following drone and missile strikes on Qatar’s Ras Laffan Industrial City. 
 
Key Properties

• Physical State: A colourless, odourless, and non-toxic noble gas.

• Thermal Extremes: It has the lowest boiling point (-268.9°C) of all elements, making it essential for reaching temperatures near absolute zero.

• Abundance vs. Scarcity: While it is the second most abundant element in the universe, it is rare on Earth because it is light enough to escape the atmosphere and cannot be produced synthetically. 

Critical Applications
Helium is considered a "strategic utility" because it often has no viable substitute: 

• Healthcare (MRI): Liquid helium cools superconducting magnets in MRI scanners. If the gas runs out, the magnet can "quench," causing permanent damage.

• Semiconductors: Essential for cooling silicon wafers and providing inert atmospheres for chip manufacturing.

• Aerospace: Used to "purge" and pressurize rocket fuel tanks (used by NASA’s Artemis program and SpaceX).

• Quantum Computing: Helium-3 is vital for ultra-low temperature cooling in next-gen quantum processors. 

Global Supply

• Legacy Sources: Historically, helium was a by-product of natural gas. Major producers included the USA, Qatar, and Algeria.

• Emerging "Primary" Projects: Companies are now racing to develop deposits where helium is the main target (primary helium) in Tanzania and Minnesota, which are not tied to volatile oil/gas markets.

• Technology Transition: The 2026 crisis has accelerated the development of "helium-free" MRI machines (using closed-loop cooling), though these still represent less than 5% of the global market. 

Attempt Today's UPSC Current Affairs Quiz
 
Q1. UNIFIL was established under which UN Security Council Resolutions?
A. 1701 and 1800
B. 242 and 338
C. 425 and 426
D. 1566 and 1624
 
Answer: C
 
 
Q2. The “Blue Line” monitored by UNIFIL represents:
A. Official international border between Israel and Lebanon
B. UN-declared economic zone
C. Line of withdrawal for Israeli forces
D. Maritime boundary
 
Answer: C
 
 
Q3. Earthquake Lights are primarily associated with which geological setting?
A. Subduction zones
B. Rift zones
C. Ocean trenches
D. Volcanic islands
 
Answer: B
 
 
Q4. The SAMPANN platform was developed by which organization?
A. Ministry of Finance
B. NITI Aayog
C. Controller General of Accounts
D. Controller General of Communication Accounts
 
Answer: D
 
Q5. Non-Deliverable Derivatives (NDDs) are characterized by:
A. Physical exchange of currency
B. Settlement through gold reserves
C. Cash settlement without actual currency delivery
D. Trading only on stock exchanges
 
Answer: C
 

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