Home › Engineering & Industrial Design › Structural Engineering & Building Materials › seismic

seismic

SIZE-mik /ˈsaɪzmɪk/

adjectiveB2SATACTGRETOEFL

generaltechnical

Relating to earthquakes or other vibrations of the earth and its crust.

In engineering, it describes design features, codes, or retrofits intended to protect structures from earthquake damage.

The story behind the word. The word was coined in the mid-19th century by Irish engineer Robert Mallet, who is considered the father of modern seismology. He took the ancient Greek word 'seismos' (shaking) to create a scientific vocabulary for studying earth tremors.

Word relationships

tectonic: Tectonic refers to the movement of the Earth's large crustal plates, while seismic refers specifically to the vibrations and earthquakes caused by those movements.

Commonly confused with

volcanic: Volcanic relates to eruptions and magma, while seismic relates strictly to ground vibrations and earthquakes (though volcanic eruptions can cause seismic activity).

Word family

seismology (noun): The scientific study of earthquakes.
seismograph (noun): An instrument that measures and records details of earthquakes.

Collocations

seismic activity
seismic design
seismic retrofit
seismic waves

Idioms & expressions

seismic shift

Example sentences

"The city updated its building codes to require advanced seismic dampers in all new skyscrapers." Urban planning
"Seismic waves from the offshore earthquake were detected by sensors thousands of miles away." Geology

Memory hook

Think of the word 'size'. A 'seismic' event is an earthquake of massive 'size' that makes the earth shake. Shaking of the earth.

When not to use

Do not use to describe general weather events like storms, floods, or high winds.

Fun facts

Some modern buildings in Japan are built on giant rubber and steel 'seismic isolators' that act like shock absorbers, allowing the ground to slide under the building without shaking it.