hypocentre
C2Technical, scientific
Definition
Meaning
The point below the Earth's surface where an earthquake originates; the focus of seismic energy release.
The exact geographical location of the initial rupture point in an earthquake. More broadly, it can refer to the point of origin or focal point of any underground disturbance, explosion, or energy release.
Linguistics
Semantic Notes
Used almost exclusively in geology and seismology. Distinct from 'epicentre', which is the point on the Earth's surface directly above the hypocentre.
Dialectal Variation
British vs American Usage
Differences
The British spelling is 'hypocentre'. The American spelling is 'hypocenter'.
Connotations
Identical technical meaning in both varieties; spelling difference only.
Frequency
Equally low frequency in both varieties, confined to technical contexts. The American spelling is more common globally in scientific publications.
Vocabulary
Collocations
Grammar
Valency Patterns
The earthquake's hypocentre was located at a depth of 10 km.Seismologists determined the hypocentre of the tremor.Vocabulary
Synonyms
Strong
Neutral
Weak
Vocabulary
Antonyms
Phrases
Idioms & Phrases
- “None. This is a technical term not used idiomatically.”
Usage
Context Usage
Business
Not used.
Academic
Used in geology, seismology, and earth science papers.
Everyday
Not used; 'epicentre' is the more common term in general news reports.
Technical
Core term in seismology for describing earthquake mechanics and location.
Examples
By Part of Speech
adjective
British English
- hypocentral depth
- hypocentral location
American English
- hypocentral depth
- hypocentral location
Examples
By CEFR Level
- Scientists located the earthquake's hypocentre.
- The earthquake's hypocentre was calculated to be 15 kilometres beneath the city.
- A shallower hypocentre often results in more severe surface shaking.
- Precise determination of the hypocentre's depth and coordinates is crucial for understanding the fault's geometry.
- The initial seismic waves radiate spherically from the hypocentre.
Learning
Memory Aids
Mnemonic
Think 'HYPO' (under) + 'CENTRE' (point). It's the UNDER-ground centre of an earthquake.
Conceptual Metaphor
THE EARTHQUAKE IS A BURSTING BALLOON. The hypocentre is the point where the balloon's skin first tears.
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Do not confuse with 'эпицентр' (epicentre). The hypocentre is the underground focus ('гипоцентр' or 'очаг землетрясения').
Common Mistakes
- Using 'hypocentre' and 'epicentre' interchangeably. The epicentre is on the surface.
- Pronouncing it as /ˈhaɪpəˌsɛntər/ instead of /ˈhaɪpəʊˌsɛntə/ in British English.
Practice
Quiz
What is the primary difference between a hypocentre and an epicentre?
FAQ
Frequently Asked Questions
No. The hypocentre (or focus) is the point within the Earth where the earthquake rupture starts. The epicentre is the point on the Earth's surface directly above the hypocentre.
No. It is a specialised scientific term. In everyday news reports about earthquakes, the word 'epicentre' is almost always used instead.
British English spells it 'hypocentre'. American English spells it 'hypocenter'.
Primarily geology, seismology, and geophysics. It can also be used in the context of underground nuclear testing.