The crystals carry a memory of environmental changes the way trees do with their rings.
Geology experts are keeping a close watch on the situation.
"It's beyond comprehension."
Other vulnerable countries have had systems in place for years.
Earthquake prediction is a science, but it can't give us all the answers we might want.
Earthquakes are essentially impossible to predict, and that's still true no matter what the headlines say.
When Tehran was struck by deadly ISIS attacks in June, President Donald Trump took the opportunity to blame Iran's government.
The country's president has issued an appeal for calm.
New evidence has found that the San Jacinto Fault zone, in California, is not as quiet as we thought and may be due for a big quake.
Current earthquake warning systems can only offer people seconds to take shelter.
The nuclear test has made the mountainous location unsuitable as a base.
First, climate change causes weather events that people want to be prepared for. People in Lima, for instance, are concerned that, if nearby glaciers melt completely, they will no longer have a water source.
Researchers have found that under certain conditions, typhoons in Taiwan triggered earthquakes.
Scientists argue that there is a link between geological features formed by seismic activity and tales of people traveling to the underworld.
If the ongoing earthquake swarm continues, it could become the longest ever recorded.
Scientists discover a geological structure in the Shumagin Gap similar to the one that produced the deadly Tohoku earthquake.
The quake had a magnitude of at least 6.3 and hit several popular tourist spots.
The earthquake swarm began six weeks ago and is ongoing.
The pontiff is visiting an area in northern Italy that was hit with earthquakes in 2012.
Environmental campaigners immediately slammed the move.