The Oct 22 Tibet quake was no random event: the Indian plate pushes into Eurasia at ~5 cm a year — the slow crush that built the Himalayas and shakes Tibet.
Updated: October 23, 2026, 10:30 IST
Quick Read
- The Indian tectonic plate is pushing into the Eurasian plate at about 5 cm a year — roughly as fast as your fingernails grow. That slow crush is what built the Himalayas, and it is what shakes Tibet.
- October 22’s 7.0 quake was shallow (10 km), and shallow quakes shake the surface much harder than deep ones — that is why the damage is so heavy.
- The same belt shook Nepal in 2015. Experts expect more quakes here; no one can predict exactly when. The “5 dos and don’ts” below show what actually helps.
When the ground shook in Tibet on October 22, it was not random. A 7.0-magnitude earthquake does not strike by chance — the land under Tibet is one of the most stressed places on Earth, and it is being crushed right now. To understand why, you need to know one thing about the ground under India: it is moving north, about 5 cm every year.
Two giant plates are colliding
The Earth’s outer shell is broken into huge slabs of rock called tectonic plates. They float slowly on hot rock below. India sits on the Indian plate. Europe and most of Asia sit on the Eurasian plate. For millions of years, the Indian plate has been pushing north into the Eurasian plate — and it has not stopped.
The plates meet head-on under the Himalayas. Think of two cars crashing into each other very, very slowly. Neither plate can move through the other, so the rock crumples upward. That crumpling is the Himalayan mountain range — and it is still rising, a few millimetres a year, because the crash never stopped.
As fast as your fingernails grow
Five centimetres a year sounds like nothing. But hold your hand up: your fingernails grow about 5 cm in a year too. Now imagine a slab of rock the size of a continent moving at that speed for 50 million years. The push never pauses, so pressure builds up along the cracks between the plates. When the rock finally slips, all that stored pressure is released at once — as an earthquake.
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Why Tibet takes the worst of it
Tibet sits on the high plateau just behind the Himalayas — right in the collision zone. The ground there is squeezed from both sides. The mountains are the visible proof: they are the highest on the planet precisely because this crash is the hardest one happening anywhere on Earth. Where the push is hardest, the quakes are biggest. That is why the Himalayan belt — Nepal, Sikkim, Tibet — keeps appearing in earthquake headlines.
Why shallow quakes are deadlier
October 22’s quake started just 10 km below the surface, according to China’s earthquake centre (the US put it at 18 km). That is shallow. Picture dropping a stone into a pond: the ripples are strongest right where the stone lands. A shallow quake puts all its energy directly into the ground people live on. A 7.0 at 100 km depth might rattle windows across a region. A 7.0 at 10 km flattens houses. The depth matters almost as much as the number.
Nepal 2015: what this looked like last time
The last time this same belt shook this hard was April 2015, when a 7.8 earthquake devastated Nepal, killing nearly 9,000 people. That quake, like this one, came from the Indian plate shoving into the Eurasian plate. Nepal sits on the southern edge of the collision; Tibet sits on its northern roof. The pressure is the same. Scientists treat the whole belt as one connected risk zone — which is also why India keeps a close eye on every big Himalayan quake, even when the epicentre is across the border.
If the ground shakes: 5 dos and don’ts
No one can predict the next quake, but the safety steps are simple and well-tested. Here is what disaster agencies actually recommend:
- Drop, cover, hold on. During the shaking, get under a strong table, cover your head, and hold on. This one move prevents most earthquake injuries.
- Stay inside — do not run. Most people hurt in quakes are hit by falling glass, walls or objects while running out. If you are outside, move to an open spot away from buildings and wires.
- Never use the lift. Take the stairs only after the shaking stops. Lifts can trap you if power cuts out.
- Keep a torch and water handy. Power and taps often fail after a big quake. A charged torch, drinking water and your phone are the three things to grab.
- Check for gas leaks after. Once the shaking stops, sniff for gas and turn it off if you smell it. One spark in a leaking kitchen can cause a fire — fires kill more people after quakes than most realise.
FAQ
- Why do earthquakes keep happening in the Himalayas and Tibet?
The Indian plate is pushing north into the Eurasian plate at about 5 cm a year — roughly as fast as your fingernails grow. That constant pressure builds up along cracks in the rock and releases as earthquakes. The collision also keeps pushing the Himalayas higher, a few millimetres a year. - Why was the October 22 Tibet quake so destructive?
Two reasons: it was strong (magnitude 7.0), and it was shallow — just 10 km deep according to China’s earthquake centre. Shallow quakes dump their energy directly into the ground people live on, so houses collapse even in remote areas. - Can scientists predict the next big Himalayan earthquake?
No. Scientists can map the risky zones — the whole Himalayan belt is one — and say a big quake is likely somewhere along it in the coming decades, but they cannot say when or exactly where. The practical answer is preparation: know the 5 dos and don’ts above.
