How large an earthquake can Main Himalayan Thrust produce?

The maximum magnitude potential compiled for Main Himalayan Thrust is M8.7. That figure comes from the length and width of the fault area that could rupture at once, calibrated against its historical and paleoseismic record. It is an upper bound on what the structure can do, not a forecast of the next event.

Is Main Himalayan Thrust overdue for an earthquake?

No fault is ever 'overdue' in the way the phrase suggests. Recurrence intervals are averages over a handful of past ruptures, not a schedule: the interval between two events on the same fault routinely varies by a factor of two or more. The elapsed time shown on this page is exactly that — how long it has been — and not a probability that a rupture is imminent.

How is the seismicity on this page selected?

Every earthquake listed sits within 25 km of the mapped trace of Main Himalayan Thrust, measured as the distance to the nearest fault segment rather than to a bounding box. Events on a neighbouring structure therefore do not appear here, even when they are geographically close. The slip rate of 18–21 mm/yr and the rupture history are compiled from the published literature.

All fault systems

Continental collision thrust

Main Himalayan Thrust

Himalaya: Nepal, India and Bhutan

Plate boundary: Indian ↔ Eurasian

Length: 2,400 km
Mₘₐₓ potential: M8.7
Slip rate: 18–21 mm/yr
Recurrence interval: ~500 years

Time elapsed since the last known rupture

11 years have passed against an average interval of about 500 years. Recurrence on a real fault is not a clock — this is elapsed time, not a probability of rupture.

Locking depth

15–25 km

The depth range over which the fault is locked and accumulating elastic strain. Below it the rock creeps aseismically; above it, strain is released in earthquakes.

Historical rupture sequence

2015M7.8Gorkha
1934M8.1Bihar–Nepal
1905M7.8Kangra

Live seismicity within 25 km of the trace (last 30 days)

Loading seismicity along this fault trace…

Frequently Asked Questions (FAQ)

Verified scientific, operational, and emergency protocols

Main Himalayan Thrust is a continental collision thrust system running roughly 2,400 km through Himalaya: Nepal, India and Bhutan. The kinematics describe how the two sides move relative to each other, which governs both the shaking a rupture produces and whether it can displace the sea floor.