Why Japan’s earthquake has Bali on edge over magnitude 9 ‘megathrust’ risk

South China Morning Post · Apr 22, 2026 · 203 words · By SCMP’s Asia desk

Geological Risk/Natural Disaster Warning

open_in_new Read the original article: https://www.scmp.com/week-asia/health-environment/article/3350994/why-japans-ear…

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8 claims extracted and verified against multiple sources including cross-references, web search, and Wikipedia.

check_circle Corroborated 5

info Single Source 2

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“Bali, Sumba and the Flores Islands are expected to be the worst hit from a megathrust earthquake in the Sumba fault”

SINGLE SOURCE

Multiple web search results discuss the threat of megathrust earthquakes in the region, mentioning Bali and the general threat, but the specific claim that Bali, Sumba, and Flores are *expected to be the worst hit* is not independently corroborated by multiple distinct sources reporting this specific comparative ranking.

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wikipedia NEUTRAL — The Lesser Sunda Islands (Indonesian: Kepulauan Sunda Kecil, Tetum: Illá Sunda ki'ik sirá, Balinese: ᬓᬧᬸᬮᭀᬯᬦ᭄ᬲᬸᬦ᭄ᬤᬘᭂᬦᬶᬓ᭄, romanized: Kapuloan Sunda Cenik), now known as Nusa Tenggara Islands (Indonesi…
https://en.wikipedia.org/wiki/Lesser_Sunda_Islands

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wikipedia NEUTRAL — Sumba (Petjo: Soemba-eiland; Indonesian: pulau Sumba), natively also spelt as Humba, Hubba, Suba, or Zuba (in Sumba languages) is an Indonesian island (part of the Lesser Sunda Archipelago group) loca…
https://en.wikipedia.org/wiki/Sumba

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wikipedia NEUTRAL — The Sumba–Flores languages, which correspond to the traditional "Bima–Sumba" subgroup minus Bima, are a proposed group of Austronesian languages (geographically Central–Eastern Malayo-Polynesian langu…
https://en.wikipedia.org/wiki/Sumba–Flores_languages

+ 3 more evidence sources

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“Hours after the quake, the Japan Meteorological Agency issued a special advisory warning of a slightly elevated risk of a temblor with a magnitude of 8 or stronger in the coming days.”

CORROBORATED

Two separate web search results confirm that the Japan Meteorological Agency (JMA) issued a special advisory warning regarding an increased risk of a temblor of magnitude 8 or stronger in the coming days following the quake.

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wikipedia NEUTRAL — The 2026 Pacific typhoon season is an ongoing event in the annual cycle of tropical cyclone formation in the western Pacific Ocean. The season runs throughout 2026, though most tropical cyclones typic…
https://en.wikipedia.org/wiki/2026_Pacific_typhoon_season

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wikipedia NEUTRAL — The Japan Meteorological Agency (Japanese: 気象庁, Hepburn: Kishō-chō; JMA) is a division of the Ministry of Land, Infrastructure, Transport and Tourism dedicated to the scientific observation and resea…
https://en.wikipedia.org/wiki/Japan_Meteorological_Agency

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wikipedia NEUTRAL — The Japan Meteorological Agency (JMA) Seismic Intensity Scale (known in Japan as the 震度(Shindo) seismic scale) is a seismic intensity scale used in Japan to categorize the intensity of local ground sh…
https://en.wikipedia.org/wiki/Japan_Meteorological_Agency_se…

+ 3 more evidence sources

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“It said there was a 1 per cent chance of a megaquake, compared with 0.1 per cent at other times.”

CORROBORATED

Multiple web search results consistently report that the Japan Meteorological Agency stated the chance of a megaquake was 1 per cent, compared to 0.1 per cent at other times.

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+ 3 more evidence sources

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“Monday’s temblor came just days after the Bali Meteorology, Climatology, and Geophysics Agency (BMKG) issued a fresh round of warnings about the risk of a megathrust earthquake with a magnitude of 9.0 on the Richter scale hitting the island.”

DISPUTED

The evidence directly contradicts the claim. Multiple web search results indicate that circulating posts falsely alleged that the BMKG issued such an alert, specifically debunking claims related to 2026. There is no evidence presented confirming that BMKG issued warnings about a magnitude 9.0 megathrust earthquake just days before a specific 'Monday's temblor' in the context described.

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wikipedia NEUTRAL — The 2018–19 Australian region cyclone season was an average season that saw the formation of 11 tropical cyclones, six of which intensified further to become severe tropical cyclones. The season offic…
https://en.wikipedia.org/wiki/2018–19_Australian_region_cycl…

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wikipedia NEUTRAL — Meteorology, Climatology, and Geophysical Agency (Indonesian: Badan Meteorologi, Klimatologi, dan Geofisika, abbreviated BMKG) is an Indonesian non-departmental government agency for meteorology, clim…
https://en.wikipedia.org/wiki/Meteorology,_Climatology,_and_…

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wikipedia NEUTRAL — Indonesia is an island country in Southeast Asia and Oceania, located in the Pacific Ocean and the Indian Ocean. The largest island nation in the world, the country is the home of over seventeen thous…
https://en.wikipedia.org/wiki/Tropical_cyclones_in_Indonesia

+ 3 more evidence sources

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“According to the US Geological Survey, megathrust happens when a stuck tectonic plate along a fault slips under its neighbour, resulting in giant earthquakes.”

CORROBORATED

Both web search results and Wikipedia entries confirm the definition. Web search results state that megathrust earthquakes occur where one plate is forced underneath another, and USGS sources describe them as occurring on faults where one plate slips under another.

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wikipedia NEUTRAL — The director of the U.S. Geological Survey (USGS) is responsible for direction and leadership of the agency. Within the director's office are the deputy director, who assists the director in coordinat…
https://en.wikipedia.org/wiki/Director_of_the_U.S._Geologica…

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wikipedia NEUTRAL — The United States Geological Survey (USGS), founded as the Geological Survey, is an agency of the United States Department of the Interior whose work spans the disciplines of biology, geography, geolo…
https://en.wikipedia.org/wiki/United_States_Geological_Surve…

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wikipedia NEUTRAL — The United States Geological Survey National Volcanic Threat Assessment is a report containing a ranked list of active volcanoes in the United States posing hazardous risks to the American population.…
https://en.wikipedia.org/wiki/United_States_Geological_Surve…

+ 3 more evidence sources

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“Other more frequent smaller earthquakes also occur within the lower plate or the crust of the upper plate.”

CORROBORATED

Two web search results confirm that earthquakes can occur in zones other than the main megathrust interface, specifically mentioning within the down-going plate or the crust of the overriding plate.

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web search NEUTRAL — Discover the science behind earthquakes — from tectonic plate movement and fault lines to seismic waves and how earthquake magnitude is measured. A complete guide to understanding why the earth shakes…
https://earthquaketoday.org/learn/why-earthquakes-happen

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web search NEUTRAL — Along convergent plate margins with subduction zones, earthquakes range from shallow to depths of up to 700 km. Earthquakes occur where the two plates are in contact, as well as in zones of deformatio…
https://geo.libretexts.org/Bookshelves/Geology/Physical_Geol…

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web search NEUTRAL — Somewhat harder to explain are the less-frequent earthquakes that occur in concentrated zones within the plate interior known as intraplate earthquakes. After all, it seems like there should be relati…
https://blogs.egu.eu/divisions/gd/2021/06/23/earthquakes-wit…

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“Bali, Sumba and the Flores Islands are expected to be the worst hit from a megathrust earthquake, according to The Bali Sun.”

SINGLE SOURCE

This claim attributes the information to 'The Bali Sun'. While web search results discuss Bali's location and travel, none of the provided evidence explicitly quotes or references 'The Bali Sun' making this specific comparative prediction.

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web search NEUTRAL — Bali is not a place to arrive unprepared It is a place where harmony emerges from diversity. The island offers destinations and experiences as varied as its visitors, which can make travel planning ex…
https://bali.com/

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web search NEUTRAL — Where should I Stay in Bali? Know Bali's Distinctive Tourism Areas Canggu, Seminyak, Uluwatu, Sanur, Nusa Dua, Kuta, Ubud. Best places in Bali
https://bali.com/bali/destinations/

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web search NEUTRAL — Bali’s history can be traced back to the Stone Age, with early cultural influences recorded through ancient artifacts and inscriptions. Bali’s culture and history cannot be understood without linking …
https://bali.com/bali/travel-guide/culture/brief-history-of-…

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“The BMKG, however, stressed that the warnings were a risk assessment rather than a prediction.”

CORROBORATED

Two web search results indicate that BMKG officials stressed that warnings regarding megathrust earthquakes represent a risk assessment rather than a definitive prediction.

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web search NEUTRAL — An animation detailing how earthquake warning systems work: When P waves are detected, the readings are analysed immediately, and, if needed, the warning information is distributed to advanced users a…
https://en.wikipedia.org/wiki/Earthquake_early_warning_syste…

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web search NEUTRAL — Map of the epicenter of six earthquakes that shook the Mentawai-Siberut megathrust zone segment throughout early Sunday morning until morning, April 23, 2023. Its strengths ranged from M5.9 to the sma…
https://en.tempo.co/read/1907627/ugm-lecturer-says-megathrus…

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web search NEUTRAL — In an online discussion titled 'Megathrust Earthquake and Early Warning' held by the Jakarta Foreign Correspondents Club (JFCC), Tuesday (10/9), he emphasized that there is no technology that can dete…
https://observerid.com/bmkg-statement-about-megathrust-is-a-…

info Disclaimer: This analysis is generated by AI and should be used as a starting point for critical thinking, not as definitive truth. Claims are verified against publicly available sources. Always consult the original article and additional sources for complete context.

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Why Japan’s earthquake has Bali on edge over magnitude 9 ‘megathrust’ risk

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