05/01/2026
EXECUTIVE EARTHQUAKE SITUATION REPORT & TECHNICAL ANALYSIS
Event: Morigaon–Dhing, Assam
Date/Time: 5 January 2026 | 04:17 IST
Magnitude: M5.2–5.4 (agency-dependent)
Depth: 10–35 km
Status: Confirmed | Reviewed
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1. EVENT SNAPSHOT (TOP-LINE)
At 04:17 AM IST on 5 January 2026, a moderate but widely felt earthquake impacted Central Assam, with the epicentral zone between Morigaon and Dhing. Despite the moderate magnitude, shallow depth and regional geology amplified felt shaking, triggering widespread public response across Assam, Meghalaya, Arunachal Pradesh, North Bengal, Bangladesh, Bhutan, and parts of China.
Bottom line: High perceptibility, low structural damage, zero confirmed fatalities.
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2. SEISMIC PARAMETERS – CONSOLIDATED VIEW
Magnitude dispersion: 5.1–5.4 (USGS, EMSC, GFZ, IRIS, RaspberryShake)
Epicenter: ~26.37°N, 92.39°E
Focal depth uncertainty: 10 km (preferred shallow model) to 35 km
Energy release: ~4 × 10¹² joules (~951 tons TNT equivalent)
Rupture scale: ~7 km fault length (first-order estimate)
This variance is normal in near-real-time seismic solutions and converges within acceptable uncertainty bounds.
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3. INTENSITY & GROUND SHAKING (MMI)
Maximum reported intensity:
MMI VI–VII (Strong to Very Strong) within ~10 km of epicenter
Dominant regional intensity:
MMI IV–V (Light to Moderate) across Guwahati, Nagaon, Tezpur, Shillong
Duration:
10–60 seconds reported, including rolling and lateral motion
Key insight: Shallow-source mechanics + sedimentary basin effects in the Brahmaputra valley significantly increased felt duration and perceptibility.
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4. HUMAN EXPOSURE & PUBLIC RESPONSE
Estimated population exposed: ~47.8 million
Felt reports: 330+ verified user reports
Peak reporting clusters: Guwahati, Dispur, Nagaon, Morigaon
Public feedback confirms:
Waking from sleep
Swinging beds
Rattling furniture
Audible subsurface rumbling
No large-scale panic or infrastructure failure observed.
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5. DAMAGE & RISK ASSESSMENT
USGS Alert Level: 🟢 GREEN
Expected fatalities:
65% probability of zero
100
Economic loss projection:
99.9% probability below USD 1 million
Structural context:
The region contains a mix of non-engineered masonry, adobe, and RCC structures. While damage remained minimal, vulnerability remains high for stronger future events.
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6. REGIONAL TECTONIC CONTEXT
This earthquake aligns with the Eastern Himalayan–Indo-Burma plate interaction zone, one of the most seismically complex regions in the world.
Historical benchmarks:
1943 Assam earthquake: M7.1
2021 Assam earthquake: M6.0
2025 Darrang earthquake: M5.8
Conclusion: The 2026 Morigaon event is not anomalous, but part of an active, stress-accumulating tectonic regime.
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7. AFTERSHOCK OUTLOOK
No confirmed aftershocks at reporting time
Statistically, M5+ events can generate smaller aftershocks over days to weeks
Public and local authorities should remain observant but calm
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8. STRATEGIC TAKEAWAYS
This was a high-awareness, low-damage seismic event
Demonstrates critical need for regional seismic transparency
Reinforces urgency for:
Dense sensor networks
Real-time early-warning pilots
Public risk communication
Building-code enforcement
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9. FINAL ASSESSMENT
The Morigaon–Dhing M5.2 earthquake serves as a clear operational reminder:
Northeast India is not earthquake-prone by chance—it is earthquake-prone by design of nature.
Preparedness, data-driven policy, and early-warning infrastructure are no longer optional—they are strategic necessities.
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Stay alert. Stay informed. Science saves lives.
— Earthquake Monitoring & Analysis Desk