Energy at the source
Magnitude is a calculated measure of earthquake size. Small numerical differences can represent substantial changes in released energy.
Global seismic reference
Earthquake overview map
A practical guide to locating recent earthquakes and reading preliminary time, magnitude, depth, and geographic information without treating an early estimate as final.
Map reference
Reading recent seismic activity
Event symbols are a starting point for investigation. They do not by themselves establish damage, local intensity, or tsunami risk.
Geography gives the event contextCompare the reported epicenter with coastlines, populated areas, terrain, and known regional hazards.
Core fields
What an event record tells you
Where rupture begins
Depth describes the earthquake focus below the surface. A shallow event can produce strong nearby shaking, but local conditions remain decisive.
Epicenter and distance
The epicenter is the surface point above the focus. Distances to communities help provide context but do not prove observed effects.
Check the time zone
Seismic records may use coordinated universal time or local time. Confirm the label before comparing reports or personal observations.
Observed shaking varies
Intensity describes effects at a particular place and can vary across the same event because of distance, soil, terrain, and construction.
Preliminary values can change
As more station data becomes available, agencies may revise the origin time, coordinates, magnitude, and depth.
How to use the overview
Four checks before drawing conclusions
These steps help distinguish a preliminary map marker from a verified account of local conditions.
- Confirm the timestampCheck the date, time, and time zone so that you are viewing the intended event.
- Read magnitude and depth togetherNeither field alone describes the shaking experienced in every nearby location.
- Compare agency updatesExpect early coordinates and measurements to be refined as analysis continues.
- Look for local informationUse official notices for felt intensity, damage, access restrictions, and protective action.
Prepared interpretation
A map is not an alert system
Earthquake Report offers editorial and geographic context, but this page is not designed to issue real-time emergency warnings. A map marker cannot confirm whether a building is safe, whether roads are open, or whether coastal evacuation is required.
After strong shaking, follow local emergency instructions. In coastal areas, long or strong shaking can be a natural warning; move according to established evacuation guidance rather than waiting near the shore.
Visit the preparedness library →Common questions
Overview map FAQ
Why did an earthquake move on the map?
Initial locations are calculated from limited incoming station data. Coordinates can be refined as more observations are processed.
Why did the magnitude change?
Early magnitude values are preliminary. Agencies may use additional stations or a more suitable calculation method in a later review.
Does a larger symbol mean there is damage?
No. A prominent marker may indicate magnitude, but damage also depends on depth, distance, local geology, construction, and exposure.
Can the overview map predict earthquakes?
No. A recent-event map records detected activity; it cannot reliably specify the exact time, place, and magnitude of a future earthquake.
Are all earthquakes felt?
No. Many detected events are too small, too deep, or too distant to be noticed by people at the surface.
How should I interpret an offshore earthquake?
An offshore location alone does not establish tsunami danger. Follow official tsunami information and local evacuation guidance, especially after long or strong coastal shaking.
About this site
Context for a moving planet
Earthquake Report is an editorial reference for earthquake and volcano news, historical event pages, seismic explainers, and practical preparedness material. It does not replace national seismic agencies, weather services, or civil-protection authorities.
Corrections, accessibility feedback, and editorial questions can be sent to info@earthquakereport.com-html.com.
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