&w=3840&q=100)
Earthquake of magnitude 4.7 strikes Andaman Sea, third tremor in one day
The seismic activity also occurred at a depth of 10 kilometres, similar to the past two quakes in a day.
In a social media post on X, the NCS wrote, "EQ of M: 4.7, On: 30/06/2025 12:06:25 IST, Lat: 9.60 N, Long: 93.79 E, Depth: 10 Km, Location: Andaman Sea."
The Andaman Sea experienced a second earthquake of magnitude 4.6 on the Richter Scale today, with the tremors occurring at 11.22 am, just an hour after the first quake at 10:09 am.
The social media post of NCS read, "EQ of M: 4.6, On: 30/06/2025 11:22:23 IST, Lat: 9.45 N, Long: 93.93 E, Depth: 10 Km, Location: Andaman Sea."
Earlier today, an earthquake of magnitude 4.7 hit the Andaman Sea, according to the National Centre for Seismology (NCS).According to the NCS, the earthquake occurred at 10:09 am at a depth of 10 kilometres.
In a social media post on X, the NCS wrote, "EQ of M: 4.7, On: 30/06/2025 10:09:03 IST, Lat: 9.43 N, Long: 94.17 E, Depth: 10 Km, Location: Andaman Sea."
On June 25, an earthquake measuring 4.2 on the Richter scale struck the Andaman Sea, according to the National Centre for Seismology (NCS). As per the NCS, the quake occurred at 01:43 am at a depth of 20 km, with its epicentre located at 9.46°N latitude and 94.07°E longitude.
"EQ of M: 4.2, On: 25/06/2025 01:43:50 IST, Lat: 9.46 N, Long: 94.07 E, Depth: 20 Km, Location: Andaman Sea," National Centre for Seismology wrote on X.
The Andaman Sea and the Andaman and Nicobar Islands fall within Seismic Zone V, the highest risk zone in India. The Alpine-Himalayan seismic belt, which extends up to the Andaman-Nicobar island region, is known to be one of the world's seismically active belts, according to the Ministry of Earth Sciences.
Try Our AI Features
Explore what Daily8 AI can do for you:
Comments
No comments yet...
Related Articles
India.com
2 days ago
- India.com
Three earthquakes in 13 days! Why are so many quakes striking Delhi-NCR? Is there a need to worry?
Home News Three earthquakes in 13 days! Why are so many quakes striking Delhi-NCR? Is there a need to worry? Three earthquakes in 13 days! Why are so many quakes striking Delhi-NCR? Is there a need to worry? Delhi is located in Seismic Zone IV, an area with active geological faults, which, coupled with its history of tremors and substandard building practices, makes it highly susceptible to significant earthquake damage. Three earthquakes in 13 days! Why are so many quakes striking Delhi-NCR? Is there a need to worry? New Delhi: An earthquake of magnitude 3.2 on the Richter scale hit Haryana's Faridabad in the early hours of Tuesday, the National Centre for Seismology (NCS) said. The tremors were also felt across the Delhi National Capital Region. However, no injuries or damage were reported. According to the NCS, the tremors occurred at a depth of 5 km beneath the surface with a latitude of 28.29°N and longitude 72.21°E. It was the third quake that jolted the Delhi-NCR region in less than two weeks (13 days). The back-to-back earthquakes in or around the national capital have raised major concerns: why are so many earthquakes happening with such frequency? What Is An Earthquake? An earthquake is the sudden shaking or trembling of the ground caused by movement of the Earth's tectonic plates. This sudden movement released energy in the form of seismic waves, which travel throughout the Earth and cause it to shake. These seismic phenomena usually happen along faults-cracks in the Earth's crust where the plates slide past each other, collide or move apart. The point where the earthquake originates underground is called the focus, and the surface directly above is known as the epicentre. Why Does Delhi-NCR Experience So Many Earthquakes? The reason for the frequent tremors is Delhi lying at the junction of several tectonic plates and fault lines, classifying it in Seismic Zone IV. This zone is the most vulnerable area for earthquakes as per the division in India. notably, there are 4 seismic zones in India, Zone II, Zone III, Zone IV, and Zone V. This makes it have a fairly high frequency. Being a 'high-risk area' means earthquakes in Delhi and surroundings can go up to magnitude 5-6. An earthquake of magnitude 7-8 is an 'occasional' occurrence in Delhi. The Delhi-Haridwar Ridge and Delhi-Moradabad Fault are two major lineaments that pass through Delhi and make it more sensitive to earthquakes. The region's proximity to the Himalaya's is another key factor. This ongoing tectonic activity results in frequent tremors felt in the northern plains, including the Delhi-NCR region. What To Do During An Earthquake? • Drop, Cover, and Hold: Drop to your hands and knees immediately to prevent falling. Cover your head and neck with your arms and, if possible, take shelter under a sturdy table or desk. • Stay indoors until shaking stops: Do not run outside during the shaking—falling debris outside can be dangerous. Stay away from windows, mirrors, glass doors, and anything that could shatter. • If you are Outside: Move to a clear area away from buildings, trees, streetlights, and utility wires. Stay there until the shaking stops. • If you are in a Vehicle: Stop as quickly and safely as possible and stay in the vehicle. Avoid stopping near or under buildings, trees, overpasses, and utility wires. Proceed cautiously once the shaking stops. For breaking news and live news updates, like us on Facebook or follow us on Twitter and Instagram. Read more on Latest India News on
NDTV
17-07-2025
- NDTV
3.3 Magnitude Earthquake Hits Haryana's Rohtak, 4th Tremor In 8 Days
Rohtak: An earthquake measuring 3.3 on the Richter scale struck Rohtak in Haryana early Thursday, according to the National Centre for Seismology (NCS). The tremor was recorded at 12:46 a.m., with a depth of 10 km. Sharing the update on X, the NCS posted, "EQ of M: 3.3, On: 17/07/2025 00:46:20 IST, Lat: 28.88 N, Long: 76.76 E, Depth: 10 Km, Location: Rohtak, Haryana." EQ of M: 3.3, On: 17/07/2025 00:46:20 IST, Lat: 28.88 N, Long: 76.76 E, Depth: 10 Km, Location: Rohtak, Haryana. For more information Download the BhooKamp App @DrJitendraSingh @OfficeOfDrJS @Ravi_MoES @Dr_Mishra1966 @ndmaindia — National Center for Seismology (@NCS_Earthquake) July 16, 2025 No casualties or property damage have been reported so far, but officials are keeping a close watch on developments as seismic activity in the region remains heightened. This is the fourth significant earthquake in Haryana within the last eight days. On July 11, Jhajjar district was hit by a 3.7 magnitude quake, followed just hours later by a stronger 4.4 magnitude tremor in the same area. Both quakes were felt widely across Delhi-NCR, sparking concern among residents and prompting widespread posts on social media and alert apps. Some also said that it felt like the "longest earthquake" in the national Capital region. Seismological records show that since July 10, at least four earthquakes of magnitude above 2.5 have occurred within a 40-kilometre radius of Rohtak. Experts link this recurring seismic activity to the complex network of geological fault lines that run beneath Delhi-NCR and its adjoining regions, including Rohtak and Jhajjar. These include the Mahendragarh-Dehradun Fault (MDF), Delhi-Sargodha Ridge, Delhi-Haridwar Ridge, and the Sohna and Mathura faults. The tectonic setting here is influenced by both the movement of the distant Himalayan tectonic plates and local fault dynamics. While most earthquakes in the region fall within the 2.0 to 4.5 magnitude range, seismologists warn they are indicative of accumulating tectonic stress. The July 11 quake, for example, is suspected to have originated along the MDF, pointing to active fault movement. Authorities have urged residents to remain vigilant and prepared.
The Hindu
16-07-2025
- The Hindu
A tectonic shift in thinking to build seismic resilience
The tremors that were felt in Delhi on July 10, 2025, at 9.04 a.m. with a magnitude of 4.4 on the Richter Scale — as reported by the National Center for Seismology (NCS) — are a wake-up call for India's seismic vulnerability. The epicentre, which was located approximately 20 kilometres southwest of the city at a shallow depth of five kilometres, did not cause significant damage but but exposed the fragility of the capital's infrastructure, where over 80% of buildings, especially those pre-dating the year 2000, fail to comply with seismic codes. The July event follows a series of earthquakes across Asia since March 2025, including the devastating quake in Myanmar and Thailand (magnitude 7.7), tremors in Tibet and Greece, and recurring seismic activity along the India-Myanmar border. As India sits on one of the world's most tectonically active plates, the urgency to build seismic resilience has never been greater. The danger of unpreparedness India's seismic risk is rooted in the northward drift of the Indian Plate, colliding with the Eurasian Plate at 4 centimetres to 5 cm a year, shaping the Himalayas, which is a region overdue for a 'Great Himalayan Earthquake' of magnitude 8 or higher, potentially impacting over 300 million people across northern India, Nepal, and Bhutan. Delhi, which lies in Seismic Zone IV (high risk), with a peak ground acceleration (PGA) factor of 0.24g, lies perilously close to this tectonic frontier. The tremors felt in July, though moderate, highlighted the risk to the city's estimated 33.5 million residents and over 5,000 high-rises, many built without adhering to the Bureau of Indian Standards' IS 1893:2016 Code, which mandates ductile detailing and shear walls. Historical events such as the Bhuj earthquake of 2001 (7.7 magnitude, 20,000-plus deaths) and the Nepal quake of 2015 (7.8 magnitude) underscore the catastrophic potential of unpreparedness. Beyond Delhi, India's seismic zones, which range from Zone II to V, span a vast vulnerable area. The northeast, including Manipur, Nagaland, and Mizoram in Zone V (very high risk, PGA 0.36g+), has felt the ripple effects of seismic activity in Myanmar, notably the 7.7 magnitude Mandalay quake on March 28, 2025, and a 5.2 magnitude event on May 17, 2025. The Andaman and Nicobar Islands, also in Seismic Zone V, remain prone to tsunamis following subduction zone activity, as seen in 2004. The 5.7 magnitude Tibetan quake on May 12, 2025, caused tremors in Sikkim, reinforcing the restlessness in the Himalayan belt. Even distant events, such as the quake of magnitude of 6.2 in Greece on May 22, 2025, reflect a global pattern of tectonic unrest, though their direct impact on India is minimal. Greater danger with urbanisation Delhi's rapid urbanisation exacerbates the risk it faces. Older structures in East Delhi, built on liquefaction-prone soils, and poorly designed high-rises pose a threat during strong quake shaking. The NCS's real-time monitoring using the IndiaQuake app offers early warnings, but enforcement and public awareness lag behind. Compare this to Bangkok, where updated seismic codes since 2007 mitigated damage despite a flat-slab collapse in 2025, or Myanmar, where unenforced codes worsened the quake toll in 2025. India must bridge this enforcement gap to protect its cities. The global seismic context heightens the urgency. The Greece earthquake, though 5,000 km away, is part of a series of tremors since March, including those in Indonesia, the Chile-Argentina border, and Ecuador on May 3, 2025. While these do not directly trigger Indian quakes, they signal a dynamic earth, pointing to the need for preparedness. The Himalayan seismic gap, where strain has built since the quake in Kangra (1905) and the 'Gorkha quake' (Nepal, 2015), are a ticking clock, with a major event potentially devastating Delhi and beyond. To counter this, India must enforce seismic codes rigorously. In Delhi, retrofitting older buildings with steel jacketing and mandating deep pile foundations in vulnerable areas can enhance stability. Guwahati, in Zone V, needs strict IS 1893:2016 compliance, avoiding Brahmaputra floodplain construction to prevent liquefaction, and adopting base isolation for critical infrastructure. Bhuj requires expanded retrofitting and community disaster response teams. The Delhi Development Authority should accelerate compliance checks, while the NCS expands early warning systems to rural Zone V areas. Global lessons The international lessons are instructive. Bangkok's use of high-strength concrete (30MPa-40 MPa) and ductile detailing offers a model, though its lower seismic risk (0.1g-0.2g) differs from India's Zone V challenges. The damage seen in Myanmar due to unreinforced masonry is a warning about neglect — a risk India must avoid. Tailored solutions — accounting for the Northeast's soft soils and Kutch's sandy basins — require annual retrofitting investments of ₹50,000 crore, as estimated by experts. With seismic activity intensifying regionally and globally, India cannot afford delay. The Government of India must lead with stringent enforcement, public education, and resilient infrastructure investment. Citizens should educate themselves about the need for emergency kits, safe building practices, and evacuation plans. The Bhuj disaster, where unpreparedness amplified casualties, remains a haunting lesson. As tremors punctuate India's seismic landscape, building resilience is a technical and moral duty in order to protect lives and livelihoods. There needs to be a national dialogue urging action before the next major quake strikes. Delhi's tremor echoes this urgency, demanding a transformation from vulnerability to strength. Balasubramanian Govindasamy is a retired Chief Engineer and former Deputy Adviser, Ministry of Jal Shakti, Government of India. He has been a central government team member to mitigate the drinking water problem in the wake of natural calamities across India
