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'Segamat tidak berada dalam kawasan garis sesar aktif untuk risiko gempa lebih besar'
- Admin UKK
- Berita
JOHOR BAHRU: Potensi gempa bumi berskala lebih besar berlaku di Segamat, Johor adalah rendah kerana daerah itu tidak berada dalam kawasan garis sesar aktif.
Pensyarah Kanan Fakulti Kejuruteraan Awam Universiti Teknologi Malaysia (UTM), Prof Madya Ir Dr Mariyana Aida Ab Kadir, berkata gegaran di daerah itu hari ini dikategorikan sebagai gegaran kecil dan tidak mendatangkan kesan serius kepada penduduk serta struktur yang berada di kawasan sekitar.
Beliau yang juga ahli kumpulan Engineering Seismology and Earthquake Engineering Research (eSEER) UTM, berkata pemantauan berterusan perlu dibuat bagi membolehkan maklumat awal disalur supaya penduduk tidak panik.
"Jika merujuk kepada peta kontur Peak Ground Acceleration (PGA) National Annex: 2017 (MS EN 1888-1:2015), Johor umumnya dan Segamat khususnya tidak berada dalam kawasan aktiviti garis sesar aktif dan terletak dalam PGA empat peratus iaitu kelajuan pergerakan tanah semasa gempa bumi.
"Gempa bumi boleh berlaku di kawasan garis sesar sama ada di kawasan darat atau laut.
"Garis sesar boleh dikenal pasti sama ada aktif atau tidak. Pergerakan tanah pada garis sesar aktif untuk mencerap pergerakan atau getaran tanah semasa gempa bumi boleh dicerap menggunakan alat seismometer.
"Di Malaysia, rekod pergerakan tanah disebabkan oleh gempa bumi boleh didapati dari Jabatan Metreologi Malaysia (METMalaysia).
"Justeru, pemantauan perlu dibuat untuk memberi maklumat awal, selain membantu masyarakat untuk mengambil langkah berjaga-jaga bagi mengurangkan risiko kemalangan dan kerosakan," katanya.
Mariyana Aida berkata, jika berlaku gegaran sederhana di kawasan luar lingkaran garis sesar aktif, ia mungkin disebabkan oleh faktor lain seperti aktiviti industri berat, contohnya aktiviti kuari.
Katanya, gegaran berkekuatan sederhana umumnya boleh dirasai oleh penghuni di tingkat atas bangunan tinggi. "Mereka mungkin berasa sedikit bergoyang, namun tidak ketara," katanya.
Gegaran gempa bumi lemah bermagnitud 4.1 dilaporkan berlaku di Segamat pada jam 6.13 pagi tadi, manakala gegaran gempa bumi lemah kedua bermagnitud 2.8 direkodkan berlaku di Kluang pada jam 9 pagi hari ini.
JOHOR BAHRU, Aug 24 — The Malaysian Meteorological Department (MetMalaysia) has advised the public to not worry over the low-magnitude earthquake that hit Johor today.
Its director-general, Dr Mohd Hisham Mohd Anip said the department would monitor the situation and issue information about the earthquake and the latest weather details.
“Information can be obtained on our official website, the myCuaca app and social media channels, and queries can be made through the hotline 1300-22-1638,” he said in a statement today.
He also explained that the 2.8 magnitude earthquake at hit at 9 am occurred in the area of Yong Peng near Batu Pahat district, around 28 kilometres (km) northwest of Kluang.
Analysis by the department also revealed that two earthquakes occurred, the first, a 4.1 magnitude quake in Segamat at 6.13 am and the second in the Mersing Fault Zone area.
“The quake was also felt in certain areas around Melaka, Negeri Sembilan and southern Pahang and was detected by Indonesia’s Badan Meteorologi, Kimatologi dan Geofisika (BMKG),” he added. — Bernama
KUALA LUMPUR: The 4.1 magnitude earthquake that struck Segamat early today should be taken as a “wake-up call” for Malaysia to strengthen seismic monitoring, disaster preparedness and structural safety audits, say Malaysian structural and seismic experts.
Malaysian Academy of Sciences fellow and Malaysian Structural Steel Association (MSSA) deputy president Ir. Dr Azlan Adnan said the 6.13 am tremor was likely triggered by tectonic stress release on a minor fault previously unmapped or thought inactive in southern Peninsular Malaysia.
“Johor, including Segamat, was previously considered outside active zones like Sabah or Sumatra, but the risk is not zero.”
“From an engineering seismology perspective, this event is an early signal that local geological structures must be identified, characterised and closely monitored.”
“This requires detailed fault-mapping studies, more effective site-effect assessments and a denser monitoring network in the region,” he told Bernama today.
He said records from MetMalaysia showed the peak ground acceleration intensity reached 10%, a level that could potentially cause minor damage to nearby structures if repeated.
Commenting on aftershock risks, Dr. Azlan said the first 72 hours after a tremor were the most critical. “Smaller aftershocks are possible.”
“The likelihood of a stronger quake remains low, but not impossible.”
“Caution should be exercised as though this were a foreshock until subsequent activity subsides and no dangerous clustering is detected.”
“If it is indeed a foreshock, then a stronger earthquake of greater magnitude than 4.1 could occur,” he warned.
In terms of impact, he noted that older or poorly maintained structures, non-structural components (such as suspended ceilings, decorative stonework, and rooftop water tanks), as well as slopes and retaining walls, were at risk of light to moderate damage if tremors recur.
“Local utilities (such as water, electricity and telecommunications) may also be disrupted if equipment is not quake-resistant.”
“This means risks may recur, and we should not wait for major damage before strengthening preparedness,” he said.
Dr Azlan urged the government, technical agencies, local authorities and researchers to work together in strengthening high-density seismometer networks, applying GNSS (Global Navigation Satellite System) and InSAR (Interferometric Synthetic Aperture Radar) technologies, conducting urban microzonation studies, and carrying out rapid audits of critical buildings.
He also advised the public to practise international safety guidelines such as “Drop, Cover, Hold On” during tremors, exit calmly once shaking stops, avoid using elevators, check for structural damage and keep a 72-hour emergency kit with water, food, flashlights, medicines and a family communication plan.
Meanwhile, Universiti Teknologi Malaysia (UTM) lecturer in seismic engineering and earthquake studies Dr Mohd Nur Asmawisham Alel stressed that Malaysia should no longer feel overly safe from seismic threats.
He said between 1922 and 2020, 59 earthquakes were recorded in Peninsular Malaysia, while Sabah experienced 67 incidents between 1900 and 2019, including the deadly 2015 Ranau quake that claimed 18 lives.
Therefore, he said Malaysia’s adoption of the Eurocode 8 earthquake-resistant building standard in 2021 should be supported with reassessments of older buildings, nationwide disaster education and regular drills by both authorities and communities.
“Continuous monitoring by authorities must be matched with improved public awareness and disaster education at all levels.”
“At the same time, old buildings that do not meet modern standards must be reassessed to ensure occupants’ safety.”
“With combined efforts from the government, agencies and society, Malaysia can reduce risks and strengthen resilience against future earthquakes,” he said.
The Malaysian Meteorological Department (MetMalaysia) confirmed a 4.1 magnitude earthquake occurred in Segamat at 6.13 am today, followed by a second weaker tremor of 2.8 magnitude at 9 am, 28 kilometres northwest of Kluang. – Bernama
KUALA LUMPUR, 24 Ogos: Petronas Gas Bhd (PGB) mengesahkan semua infrastruktur dan kemudahan saluran paip gas di kawasan yang dilanda gempa bumi kecil berhampiran Segamat, Johor awal pagi tadi kekal selamat sepenuhnya dan beroperasi seperti biasa.
“Sejurus menerima makluman mengenai gegaran itu, pasukan teknikal dan wilayah kami segera melaksanakan protokol keselamatan standard yang sedia ada bagi menghadapi kejadian seumpama ini di seluruh wilayah selatan,” kata syarikat minyak dan gas itu dalam satu kenyataan hari ini.
Sebagai sebahagian daripada prosedur yang ditetapkan, PGB berkata pemeriksaan telah dijalankan di Stesen Pemampat Segamat, Stesen Kawalan Segamat dan di sepanjang laluan saluran paip yang berkaitan.
Sehubungan itu, tiada sebarang kelainan atau gangguan dikesan katanya.
“Pemantauan secara langsung melalui sistem kawalan penyeliaan dan pemerolehan data (Scada) kami juga mengesahkan tahap tekanan dan parameter operasi kekal stabil,” katanya.
PGB berkata pihaknya mengekalkan komunikasi aktif dengan pihak-pihak berkuasa tempatan yang berkaitan dan Jabatan Meteorologi Malaysia (MetMalaysia) bagi mendapatkan maklumat terkini secara berterusan.
“Kami akan terus mengutamakan keselamatan orang awam dan operasi kami sambil melaksanakan pemantauan yang rapi dan bersiap sedia untuk bertindak sekiranya keadaan berubah,” tambahnya.
MetMalaysia dalam satu kenyataan berkata berlakunya gegaran gempa bumi lemah bermagnitud 4.1 di Segamat, Johor pada 6.13 pagi tadi dan turut dirasai penduduk di Melaka, Negeri Sembilan dan selatan Pahang. -TVS
JOHOR BAHRU: The Malaysian Meteorological Department has advised the public to remain calm following a low-magnitude earthquake that struck Johor today.
Director-General Dr Mohd Hisham Mohd Anip stated that the department would continuously monitor the situation and provide updated information.
“Information can be obtained on our official website, the myCuaca app and social media channels, and queries can be made through the hotline 1300-22-1638,” he said in a statement today.
He confirmed that a 2.8 magnitude earthquake occurred at 9 am in the Yong Peng area near Batu Pahat district.
The seismic event was located approximately 28 kilometres northwest of Kluang according to department analysis.
MetMalaysia’s investigation revealed that two separate earthquakes had occurred in the region.
The first earthquake measured 4.1 magnitude and struck Segamat at 6.13 am this morning.
The second earthquake originated from the Mersing Fault Zone area as confirmed by seismic monitoring.
Tremors from these events were felt in certain areas around Melaka, Negeri Sembilan and southern Pahang.
Indonesian meteorological authorities also detected the seismic activity through their monitoring systems.
The department continues to assure residents that these were low-magnitude events requiring vigilance but not alarm.
Regular updates will be provided through all official MetMalaysia communication channels as monitoring continues. – Bernama