Myanmar: quake and pollution

A magnitude-4.0 earthquake struck Myanmar on Sunday as pollution from rare-earth mining upstream was already fouling the Kok River into northern Thailand. (aninews.in) (straitstimes.com) India’s National Centre for Seismology said the quake hit Myanmar at 04:29:26 Indian Standard Time on April 12, 2026, at latitude 23.141 north and longitude 96.072 east, with a reported depth of 140 kilometers. Myanmar’s own Department of Meteorology and Hydrology has posted multiple earthquake bulletins this month, including a magnitude-4.1 event on April 10 and a magnitude-4.0 event on April 7. (aninews.in) (moezala.gov.mm) Along the Kok River in Chiang Rai, Thai communities say the water that is usually clear in March and April has turned thick and cloudy with sediment, industrial run-off and heavy metals. The Straits Times reported on April 11 that fishermen, farmers and tourism operators along the river are already losing income. (straitstimes.com) Thai researchers have found arsenic accumulation in some residents living along the Kok, and reporting in Thailand said arsenic readings in the basin have reached more than twice the national surface-water standard of 0.01 milligrams per litre. Thailand’s Pollution Control Department also said last month that arsenic above 0.01 milligrams per litre had been detected in parts of the Kok River and its tributaries. (straitstimes.com) (nationthailand.com) (bangkokpost.com) Rare earths are a group of minerals used in electric vehicles, wind turbines and some defense systems, but one common extraction method pumps chemical solution into hillsides and leaves contaminated water to drain downhill. Reporting from Thailand said water mixed with fertilizer or acid is injected into deforested slopes in Myanmar, then discharged back into waterways after the ore is separated. (nationthailand.com) (business-humanrights.org) The mining surge accelerated after Myanmar’s February 2021 military coup, when weakened oversight and fighting in border areas opened space for illicit extraction. Institute for Strategy and Policy-Myanmar data cited in multiple reports said active rare-earth mining sites rose from about 130 in 2020 to more than 370 by the end of 2024. (stimson.org) (business-humanrights.org) (ispmyanmar.com) Satellite analysis has widened the picture beyond one river. The Stimson Center said in October 2025 that it had identified more than 500 rare-earth mining sites along tributaries of the Mekong, Salween and Irrawaddy, including dozens opened in 2025. (business-humanrights.org) (mongabay.com) Communities downstream say the damage is visible in daily life. The Straits Times reported that one fisherman’s catch was selling for about one-third of its usual price, while an elephant camp upstream from Chiang Rai had gone quiet after boats and riverside tourism dried up. (straitstimes.com) The politics are cross-border and contested. Reporting cited Chinese-linked operators, a Chinese Embassy statement saying Beijing was “highly concerned” about heavy-metal pollution in Thai tributaries, and no response to requests for comment from a United Wa State Army spokesman and a China Rare Earth Group representative. (business-humanrights.org) Sunday’s quake was modest, but it landed in a country where river pollution, conflict and weak oversight are already pushing damage across borders. On the Kok, the water remains the clearest measure of that strain: brown, turbid and carrying the crisis downstream. (aninews.in) (straitstimes.com)