标签： Asia

Japanese authorities have escalated warnings about a potential catastrophic earthquake following Monday’s magnitude 7.5 tremor that struck northeastern Japan. This alert marks the second such warning in under two years, reviving concerns about the anticipated ‘big one’—a seismic event projected to occur once every century.

According to Japan’s earthquake investigation panel, there is a 60-90% probability that a megaquake could originate from the Nankai Trough within the next three decades. This seismic zone extends along Japan’s Pacific coastline and has historically generated devastating earthquakes. Officials have projected worst-case scenarios including tsunamis exceeding 20 meters (66 feet) that could inundate Tokyo and surrounding prefectures, potentially resulting in approximately 300,000 fatalities and trillions of dollars in economic devastation.

Residents across seven prefectures—from Hokkaido in the north to Chiba in central Japan—have been instructed to maintain heightened preparedness. While no formal evacuation orders have been issued, authorities are urging citizens to verify evacuation routes, secure household furniture, and assemble emergency supplies including food, water, and portable sanitation facilities.

Government seismologists indicate that there is approximately a 1% chance that Monday’s earthquake could trigger a subsequent magnitude 8.0 or larger event. Takashi Yokota, Japan’s director for disaster management, emphasized during a press briefing that current global seismic data suggests a possibility rather than a prediction of an imminent major tremor.

The Nankai Trough’s seismic history provides sobering context. This subduction zone between Suruga Bay and the Hyuganada Sea has generated catastrophic earthquakes approximately every century, often occurring in pairs. The most recent events in 1944 and 1946 resulted in significant destruction, while the 1707 rupture along the trough’s entire 600-kilometer length triggered Japan’s second-largest recorded earthquake and subsequent Mount Fuji eruption.

Seismological experts remain divided on prediction capabilities. Geologists Kyle Bradley and Judith Hubbard describe the Nankai Trough’s historical pattern as ‘convincingly scary,’ while University of Tokyo Professor Emeritus Robert Geller maintains that earthquake warnings have ‘almost nothing to do with science,’ noting that only about 5% of earthquakes are preceded by detectable foreshocks.

Japan’s current warning system, developed after the catastrophic 2011 magnitude 9.0 earthquake that killed over 18,000 people, was first implemented in August 2024. The Japan Meteorological Agency continues to balance public awareness with caution, stating that while earthquake probability is elevated, ‘this is not an indication that a major earthquake will definitely occur.’

BELEM, BRAZIL – At the COP30 climate summit, prominent climate scientist Winston Chow emphasized that regional renewable energy sharing represents the most viable pathway for Southeast Asia to address escalating heat-related challenges without exacerbating carbon emissions.

As co-chair of the UN’s Intergovernmental Panel on Climate Change working group on climate impacts, adaptation and vulnerability, Chow identified outdoor workers and slum residents as particularly vulnerable to rising temperatures. His analysis followed commitments from 185 cities, including Singapore, to implement localized cooling solutions that are both accessible and environmentally sustainable.

The urgency of this transition was underscored by a recent UN Environment Programme report warning that global cooling demand could triple by 2050 due to increasing temperatures, population growth, and proliferation of inefficient cooling systems. Unchecked, cooling-related emissions could nearly double, potentially overwhelming power grids and derailing climate objectives.

Chow, who serves as Professor of Urban Climate at Singapore Management University, noted Southeast Asia’s particular challenge: “We are still starved in terms of access to renewable energies,” highlighting the region’s limited solar, wind and hydropower resources compared to other areas. This scarcity underscores the critical importance of developing an ASEAN renewable energy grid, with member states targeting an interconnected power network by 2045 to ensure more affordable and reliable electricity supply.

Beyond technological solutions, Chow pointed to nature-based approaches including community gardens, street greenery and urban agriculture that provide natural cooling while delivering co-benefits like carbon sequestration. He particularly commended the UNEP report for addressing risks to vulnerable populations in heat-stressed tropical regions.

The scientist emphasized that effective cooling strategies must address both adaptation to rising temperatures and their root causes, noting: “You can’t just use air conditioning without realizing that most air conditioning is powered by fossil fuels.”

Supporting this comprehensive approach, Singapore’s Minister for Sustainability and the Environment Grace Fu announced plans to share technical expertise in sustainable cooling and urban heat resilience through the COP30 cooling initiative led by the Brazilian presidency and UNEP.

Amid sweltering conditions at the COP30 venue, Chow expressed hope that increasing temperature-related risks would spur more concerted global action, with cross-community and cross-governmental cooperation essential for implementing sustainable cooling solutions.

Military tensions between Thailand and Cambodia reached a dangerous new level on Monday as Thai fighter jets conducted aerial assaults along their shared border, marking a significant escalation in the ongoing territorial dispute. The Royal Thai Air Force confirmed deploying F-16 aircraft to strike what it identified as Cambodian fire-support positions, command centers, and logistical routes that allegedly threatened Thai sovereignty.

The aerial offensive follows weekend ground clashes in the Ubon Ratchathani Province that resulted in the death of at least one Thai soldier and multiple casualties on both sides. Thai military spokesperson Jackkrit Thammavichai asserted that Cambodia had mobilized heavy weaponry and repositioned combat units, necessitating what he described as ‘carefully executed defensive measures.’

Cambodia’s Defense Ministry vehemently denied these allegations, stating that their forces had not violated any ceasefire agreements and rejecting claims of heavy weapons deployment. According to reports from Agence France-Presse, the recent hostilities have claimed the lives of at least four Cambodian civilians, with Defense Ministry spokeswoman Maly Socheata accusing Thai forces of targeting non-combatants.

The humanitarian consequences are rapidly mounting, with approximately 400,000 residents evacuated across four Thai border provinces and the closure of hundreds of educational institutions. On the Cambodian side, 377 schools serving nearly 78,600 students have suspended operations indefinitely.

Thai Prime Minister Anutin Charnvirakul declared that military operations would continue ‘as necessary according to the situation,’ while Cambodian Senate President Hun Sen urged restraint among frontline troops. The economic implications are already causing concern among analysts, with Kiatnakin Phatra Securities economist Pipat Luengnaruemitchai warning of potential damage to tourism and trade networks.

Academic voices including Professor Puangthong Pawakapan of Chulalongkorn University have called for neutral observers to monitor the conflict and prevent further escalation, emphasizing that the violence ‘benefits no one—especially border communities and the long-term economic stability of both nations.’