epicenter
Ground zero, geologically
The epicenter is the point on Earth's surface directly above where an earthquake originates: The epicenter was located twelve miles offshore.
By extension, epicenter means the focal point or center of any activity or phenomenon: Silicon Valley remains the epicenter of tech innovation.
The figurative use sometimes draws criticism when center would suffice, but it emphasizes intensity or impact.
Earthquake's underground origin point
- magnitudeSize or scale
- faultlineCrustal fracture zone
- aftershockSmaller quake following larger
- foreshockLesser quake before larger
tremor · seismograph · tectonics · rupture · shockwave · subduction · liquefaction · seismicity
Connecting central point
- focal pointCenter of interest
- nucleusCentral controlling part
- heartCirculatory system's pump
- coreCentral essential portion
hotspot · ground zero · flashpoint · locus · node · headquarters · hotbed · crossroads
Explosion's central impact point
- HiroshimaFirst nuclear-struck city
- ChernobylSoviet nuclear disaster site
- FukushimaJapanese nuclear accident site
- devastationSevere widespread destruction
catastrophe · aftermath · fallout · destruction · impact zone · crisis · ruins · wreckage
Agent enabling change
- flashpointIgnition temperature threshold
- cruxMost important point
- hotbedPlace fostering rapid growth
- breeding groundPlace where something proliferates
spark · origin · source · birthplace · fountainhead · seedbed · crucible · tinderbox
hypocenter
Earthquake's underground origin point
- magnitudeSize or scale
- faultlineCrustal fracture zone
- aftershockSmaller quake following larger
foreshock · tremor · seismograph · tectonics · rupture · shockwave · subduction · liquefaction · seismicity · seismology
nexus
Connecting central point
- focal pointCenter of interest
- nucleusCentral controlling part
- heartCirculatory system's pump
core · hotspot · ground zero · flashpoint · locus · node · headquarters · hotbed · crossroads · concentration
ground zero
Explosion's central impact point
- HiroshimaFirst nuclear-struck city
- ChernobylSoviet nuclear disaster site
- FukushimaJapanese nuclear accident site
devastation · catastrophe · aftermath · fallout · destruction · impact zone · crisis · ruins · wreckage · casualties
catalyst
Agent enabling change
- flashpointIgnition temperature threshold
- cruxMost important point
- hotbedPlace fostering rapid growth
breeding ground · spark · origin · source · birthplace · fountainhead · seedbed · crucible · tinderbox · powder keg
- earthquake engineeringearthquake engineering, seismic waves, liquefaction, seismic risk, dampers
- earth scienceatmosphere, earthquake, geology, volcano, crust
- earthquakesearthquake, quake, earthquakes, quakes, magnitude
- geologybedrock, fault lines, faults, rock, basalt
- pandemiclockdowns, COVID-19, outbreak, epidemic, COVID
- middlemiddle, midpoint, halfway, median, midline