Chamoli Quake, Delhi Building Collapse a Day Later: When Is It Earthquake Damage and When Is It a Pre-Existing Defect?

At about 10:23 pm on Tuesday 6 October 2026, an earthquake struck Chamoli in Uttarakhand at a depth of 13 km. The National Centre for Seismology reported it as magnitude 4.9; USGS and EMSC put it at 5.1. Tremors were felt across Delhi-NCR. The Week reported no casualties and no significant damage from the Chamoli event. The same day, a separate M4.5 quake hit Nagaon district in Assam.

On Wednesday 7 October, a multi-storey building collapsed in New Seemapuri, northeast Delhi, killing three people and injuring eight. Deccan Herald and Gulf News reported that authorities suspect cracks caused by the previous evening's tremors. They were equally clear that the cause is yet to be ascertained.

That gap between suspicion and finding is the subject of this post. Nobody outside the investigation knows yet why the New Seemapuri building fell, and this piece does not claim that the quake caused it. What the sequence does show, with unusual clarity, is the question every insurer, surveyor and building owner in NCR faces when a structure fails in the days after a tremor: was this earthquake damage, or a building that was already failing and happened to fall next?

For a commercial property owner the answer decides whether a claim is paid in full, paid in part, or declined. For a landlord it can also decide who pays the families of people hurt inside or outside the building.

Indian property insurance follows the doctrine of proximate cause. The insurer pays when the dominant, effective cause of the loss is an insured peril and no exclusion applies. It is not the cause closest in time, and it is not simply the last thing that happened before the loss. A tremor followed by a collapse the next day is close in time, but timing alone proves nothing.

In a post-tremor collapse, the realistic candidates usually look like this:

1. Earthquake as the dominant cause: ground shaking damaged a structure that would otherwise have stood, and the collapse followed from that damage.
2. Pre-existing defect as the dominant cause: the building was already failing through poor construction, unauthorised added floors, corroded reinforcement, water ingress or foundation weakness, and the tremor was at most a trigger for a collapse that was coming anyway.
3. Concurrent causes: both played a real part, and the outcome turns on how the policy wording treats a loss where an insured and an excluded cause combine.

Who has to prove what

The burden of proof is split. The insured has to show that the loss falls within an insured peril. Once that is shown, the insurer has to prove that an exclusion applies if it wants to rely on one. In practice, a policyholder who can show the building was sound before the tremor puts the insurer in a much harder position than one who has no record of the building's condition at all.

The surveyor and any structural engineer appointed on the claim will look at fracture patterns, the age and spread of cracks, signs of corrosion or water damage on exposed reinforcement, and whether failure began at a point consistent with lateral shaking or with long-term overloading. Fresh fracture surfaces and old, stained cracks tell very different stories.

Before any causation argument begins, check whether earthquake is covered at all, because the answer depends on which wording you hold. On the IRDAI standard products for smaller business risks, Bharat Sookshma Udyam Suraksha and Bharat Laghu Udyam Suraksha, earthquake is one of the named perils. On the Standard Fire and Special Perils wording used for larger risks, it is not a base peril: it is bought as an earthquake add-on (often worded as earthquake, fire and shock) for an additional premium. A business on that wording that bought only the base fire policy has no earthquake claim to argue about, whatever the engineers conclude.

Where earthquake is covered, three features matter after an event like this one:

• The deductible. Earthquake cover usually carries its own deductible, sometimes expressed as a percentage (of the claim or of the sum insured, depending on the wording) rather than a flat amount, so a partial loss on a well-insured building can sit largely inside it.
• The 72-hour clause. Earthquake wordings often treat all shocks within a 72-hour window as a single event. That matters for one deductible versus several, and for whether aftershocks in that window fall under the same claim. Our guide to earthquake claims settlement in India covers the clause and catastrophe claim handling in more detail.
• The sum insured basis. If the building is insured on a book value or an out-of-date reinstatement figure, the average clause can cut a valid claim in proportion to the underinsurance.

If the insurer disputes an earthquake claim on a collapsed or cracked building, it will usually rely on one of a small group of exclusions and wording limits:

• Wear and tear and gradual deterioration: loss arising from the slow decline of the building through age, corrosion, dampness or lack of maintenance.
• Faulty design, materials or workmanship: loss that follows from how the building was built rather than from an external event.
• Normal settlement and cracking: wordings that cover subsidence or ground movement typically carve out normal cracking, settlement or bedding down of structures.

The insurer's argument in these cases is rarely that the tremor did nothing. It is that the tremor acted on a building that was already close to failure, so the dominant cause was the deterioration, not the earthquake. In older, unregulated stock where floors were added over time without structural design, that argument can be strong.

Why "both caused it" is not an answer

Policyholders often respond that the earthquake and the building's condition both contributed. That is frequently true in engineering terms. In coverage terms, the result depends on whether the excluded cause is the dominant one and on the exact wording of the exclusion. Some exclusions are drafted to apply wherever the excluded cause contributed at all; others apply only where it was the cause. A broker should read the specific wording before taking a position, because two policies with the same headline cover can produce opposite answers on the same set of facts.

Proximate-cause disputes are won and lost on records created before the loss. After a collapse, the rubble cannot tell you whether the cracks were six hours or six years old with any certainty, and investigations by public authorities move on their own timetable. What an owner can control is what it had on file before the event.

1. Pre-loss condition surveys. A dated, photographed survey of the structure, ideally by a qualified structural engineer, showing the condition of columns, beams, slabs and visible cracks.
2. Structural audits and stability certificates. Periodic audits, especially for older buildings, with records of what was recommended and what was actually done.
3. Approved plans and change history. Sanctioned drawings, records of any additional floors, and evidence that alterations were designed and approved. Unauthorised additions are one of the first things an investigator will look for.
4. Maintenance records. Waterproofing, repairs to spalled concrete, plumbing leaks fixed, and similar work that shows the building was being looked after.
5. Post-event documentation. Photographs and engineer notes taken immediately after a tremor, before any collapse, showing new cracking. If an owner notices fresh cracks the morning after a quake, that record is both a safety trigger and claim evidence.

The same records drive the surveyor's report. A surveyor who can compare post-loss damage against a recent condition survey can separate fresh seismic damage from historic deterioration far more convincingly than one working from rubble alone.

The New Seemapuri collapse killed three people and injured eight. In any building failure, the property claim is only half the exposure. The other half is legal liability to people who were inside, next to, or passing by the building.

For landlords of NCR's older mixed-use stock, with shops at street level and offices or residences above, the exposure runs in several directions:

• Tenants and their staff injured inside the building, and tenants' goods and fit-outs destroyed.
• Visitors and customers in ground-floor retail units.
• Passers-by and neighbouring properties hit by falling debris or affected by the collapse.

A claim against the owner will typically argue negligence in maintaining a building the owner knew or should have known was unsafe. Here the evidence problem cuts the other way: the same structural audits that help a property claim also help defend a liability claim, while ignored audit recommendations or unauthorised additions can do serious damage to both.

What cover responds

A property policy, including the earthquake add-on, pays for damage to the insured's own building and contents. It does not pay compensation to injured third parties. That needs a public liability policy, usually bought as part of liability insurance for the building owner or for the business operating in it. Owners should check that the limit of indemnity reflects a multi-casualty event rather than a single slip-and-fall, that the policy covers the premises as actually used (including any residential floors), and how the policy treats structural collapse and any pollution or contamination that follows. Our piece on liability allocation in mixed-use buildings sets out how owner, occupiers and facility contractors should split cover so that no one assumes another party's policy will respond.

Delhi-NCR sits in a high seismic zone, and the building stock includes a large number of older structures that were extended over decades. The Chamoli event caused no reported damage at its source, and the cause of the New Seemapuri collapse has not been established. Neither fact changes the practical lesson: a tremor felt across the region is a prompt to test both the building and the insurance programme.

For owners and occupiers of commercial and mixed-use property:

1. Confirm earthquake cover on the property schedule (named peril or add-on, depending on the wording), and note its deductible and any 72-hour clause.
2. Check the sum insured basis against current reinstatement cost. Our post on IS 1893:2025 and earthquake claim adequacy explains why valuations anchored to old figures leave earthquake claims exposed to average.
3. Commission or update a structural audit for older buildings, and act on its recommendations, or record why they were deferred.
4. Build a pre-loss evidence file with dated photographs, approved plans and maintenance history, stored off-site.
5. Review public liability limits for the realistic worst case: a partial or full collapse in occupied hours.
6. Agree a post-tremor routine: who inspects, who photographs, who notifies the insurer and when.

Brokers placing NCR property should raise these points at renewal rather than after a loss. A client who learns at claim stage that earthquake was never on the policy, or that the insurer will argue gradual deterioration with nothing on file to rebut it, has very few options left.