{
    "success": true,
    "data": {
        "id": 1651321,
        "msgid": "psgs-reveals-complexity-of-magnitude-7-4-earthquake-in-maluku-1775112714",
        "date": "2026-04-02 12:58:00",
        "title": "PSGS Reveals Complexity of Magnitude 7.4 Earthquake in Maluku",
        "author": "",
        "source": "ANTARA_ID",
        "tags": "",
        "topic": "Regulation",
        "summary": "The Sulawesi Earthquake Study Centre (PSGS) has analysed the magnitude 7.4 earthquake that struck the Maluku Sea on Thursday as a manifestation of the complex Double Subduction Zone, involving an oblique-reverse fault within the slab rather than at the main plate interface. This event highlights the intricate stress partitioning and deformation dynamics in eastern Indonesia, potentially triggering minor local tsunamis and liquefaction risks despite not being a megathrust quake. PSGS urges local governments to evaluate critical infrastructure, enhance coastal preparedness, and stresses the importance of monitoring aftershocks while following official BMKG advisories.",
        "content": "<p>Makassar (ANTARA) - The Sulawesi Earthquake Study Centre (PSGS) has\nrevealed that the magnitude 7.4 earthquake occurring on Thursday at\n06:48 WITA in the Maluku Sea reflects the complexity of the Double\nSubduction Zone. \u201cBased on the analysis of the earthquake\u2019s source\nmechanism (moment tensor) from USGS and BMKG, this quake is interpreted\nas an oblique-reverse fault (a combination of thrust and strike-slip)\noccurring within the slab (intraslab), not on the main inter-plate\ncontact plane,\u201d said PSGS Director Ardy Arsyad in a press release on\nThursday. According to him, what makes this event scientifically\nsignificant is its location in the Double Subduction Zone of the Maluku\nSea, where two oceanic plates thrust towards each other from opposite\ndirections (Sangihe and Halmahera). This condition, he said, creates a\ncomplex stress system, so earthquakes do not always follow the classic\nsubduction or megathrust patterns. \u201cThis phenomenon indicates stress\npartitioning and complex deformation dynamics in eastern Indonesia,\u201d he\nexplained. Although this is not a megathrust earthquake, said this\ngeotechnical expert and lecturer in Civil Engineering at Hasanuddin\nUniversity, the event still triggered small-scale local tsunamis in some\ncoastal areas. This confirms that tsunami potential remains, albeit with\nmore limited danger levels compared to shallow thrust fault quakes.\nAdditionally, areas with water-saturated sediments still pose\nliquefaction risks that need to be anticipated. Therefore, PSGS\nemphasises that the public should not panic but remain vigilant against\naftershocks and follow official information from BMKG and related\nagencies. \u201cWe also urge local governments to conduct rapid evaluations\nof critical infrastructure in affected areas, enhance coastal community\npreparedness for potential local tsunamis, and strengthen mitigation\nbased on risk maps and local geological conditions,\u201d he said. He assured\nthat PSGS will continue further analysis of this event, including its\nrelation to regional tectonic dynamics and implications for disaster\nrisks in Sulawesi and surrounding areas.<\/p>",
        "url": "https:\/\/jawawa.id\/newsitem\/psgs-reveals-complexity-of-magnitude-7-4-earthquake-in-maluku-1775112714",
        "image": ""
    },
    "sponsor": "Okusi Associates",
    "sponsor_url": "https:\/\/okusiassociates.com"
}