USGS Earthquake Hazards Program

USGS Earthquake Hazards Program

Explore Earthquake Data with the USGS API

The United States Geological Survey (USGS) provides a public API to access information on earthquakes worldwide. This API allows developers to query earthquake data in real time using various parameters such as location, time, and magnitude.

Getting Started

To start exploring the earthquake data, we need to first make a request to the API endpoint. The endpoint for the USGS earthquake API is

Query Parameters

The following query parameters are available for filtering the results:

  • starttime - start time of the earthquake (YYYY-MM-DD)
  • endtime - end time of the earthquake (YYYY-MM-DD)
  • minmagnitude - minimum magnitude of the earthquake
  • maxmagnitude - maximum magnitude of the earthquake
  • latitude - latitude of the location
  • longitude - longitude of the location
  • maxradiuskm - maximum radius around the location
  • orderby - order of the results (time, magnitude, distance)

API Example Code in JavaScript

Below is an example on how to retrieve earthquake data with JavaScript.

const endpoint = '';

// Set query parameters
const params = {
    starttime: '2021-01-01',
    endtime: '2021-02-01',
    minmagnitude: 6.0,
    latitude: 34.0522,
    longitude: -118.2437,
    maxradiuskm: 1000,
    orderby: 'time',

// Construct query string
const queryString = Object.keys(params)
    .map((key) => key + '=' + encodeURIComponent(params[key]))

// Make API request with fetch
fetch(endpoint + '?' + queryString)
    .then((response) => response.json())
    .then((data) => {

This code retrieves all earthquakes with a magnitude of 6.0 or higher that occurred within a 1000 km radius of Los Angeles between January 1, 2021 and February 1, 2021. The resulting data is logged to the console.


With the USGS earthquake API, we can easily access and analyze earthquake data in real time using just a few lines of code. By applying different query parameters, we can hone in on specific information and gain a better understanding of seismology. The possibilities for exploration with this API is endless.