TREMR

The epicenter was 400 km away. But Mexico City sits on ancient lake sediment that amplified the waves 50x — selectively collapsing mid-rise buildings and killing at least 10,000 people.

At 3:42 AM on July 28, 1976, Tangshan was asleep. Twenty-three seconds later, 85% of the city was gone. At least 242,000 dead — and China refused all outside help.

On All Saints' Day 1755, Lisbon was struck by an earthquake, a tsunami, and five days of fire. Up to 60,000 died — and the disaster forced Enlightenment philosophy to confront the question it had been avoiding.

On December 26, 2004, a M9.1 rupture off the coast of Sumatra sent waves across the Indian Ocean at jet speed. Fourteen countries. No warning system. The deadliest tsunami in recorded history.

At 11:58 AM on September 1, 1923, a M7.9 earthquake struck beneath Sagami Bay and destroyed Tokyo and Yokohama. Over 100,000 people died — most of them not from the shaking, but from the firestorm that followed.

A M9.2 earthquake on Good Friday 1964 shook Alaska for 4 to 5 minutes, launched tsunamis as far as Antarctica, and permanently reshaped coastal towns. Only 139 people died — here's why, and how this quake changed Earth science.

During a major earthquake, entire apartment blocks in Niigata tilted 45 degrees and fell sideways — residents walked out through the windows. That's liquefaction. Here's what it is, where it happens, and how engineers try to prevent it.

When a fault ruptures, energy radiates in different wave types — each travelling at a different speed. Understanding P and S waves is the key to understanding how earthquake early warning systems work.

On April 25, 2015, a M7.8 earthquake struck the Kathmandu Valley — killing nearly 9,000 people, destroying 500,000 homes, and exposing how urban geology amplifies seismic risk in developing nations.

After a major earthquake, emergency services can take 72 hours or more to reach everyone. Here's exactly what to stockpile — and why each item earns its place in the kit.

Scientists can estimate long-term risk and warn of shaking seconds after it starts. But predicting the exact time, place, and magnitude in advance? That remains one of science's hardest unsolved problems — and may always be.

Invisible at sea, devastating at shore. Here's the science behind how a submarine earthquake displaces the ocean and turns into one of nature's most destructive forces — and how warning systems try to get ahead of it.

Base isolators, dampers, flexible frames — modern earthquake engineering is a fascinating field. Here's how architects and engineers design structures to sway without collapsing when the ground moves.

The Haiti earthquake was M7.0 — smaller than dozens of quakes that cause little damage. Yet it killed over 200,000 people. The reason has less to do with geology than with poverty, politics, and construction quality.

Every earthquake on Tremr's map is a product of the same force: tectonic plates moving. Here's how the plates work, what drives them, and why some boundaries are far more dangerous than others.

After a major earthquake, smaller quakes can continue for months. Here's why — and how scientists use Omori's Law to estimate how long an aftershock sequence will last.

The earthquake lasted less than a minute. The fire that followed burned for three days. The 1906 disaster killed thousands, levelled a city — and permanently changed how America builds, plans, and thinks about seismic risk.

Seconds of warning can save lives. Here's how systems like Japan's and California's ShakeAlert detect the first wave of an earthquake and send alerts before the dangerous shaking arrives.

A 1,000-kilometre fault off the coast of Washington, Oregon, and California has been locked and loading since 1700. When it goes, it will be one of the largest disasters in North American history.

On March 11, 2011, a M9.1 earthquake struck Japan — triggering a tsunami, the Fukushima disaster, and nearly 20,000 deaths. The full story of the earthquake that changed Japan forever.

Tens of millions of people live directly above one of the most studied fault systems on Earth. What does that actually mean for daily life? How likely is the "Big One"? And what should Californians actually be doing to prepare?

Every earthquake you see on Tremr was detected by a network of instruments buried in the ground around the world. Here's how those sensors work, how they communicate, and how a wiggle on a graph becomes the magnitude number you see on your screen.

On May 22, 1960, southern Chile shook with a force the world had never measured before. Magnitude 9.5. The resulting tsunami crossed the Pacific and killed people as far away as Japan. This is the story of the earthquake that reset what we thought was possible.

Nearly 90% of all earthquakes happen in one zone — a horseshoe of tectonic fire encircling the Pacific Ocean. Here's what it is, why it exists, and why it shows up as a permanent ring of dots on Tremr's map.