Chart assignment

Charts to read and discuss

Read each chart, then answer its questions. Every chart shows its source and date; open it for a table of the numbers and the data to download.

  1. Which U.S. states have the most earthquakes?

Chart 1 of 1 · Earthquakes

Which U.S. states have the most earthquakes?

The interactive chart needs JavaScript. The numbers are on the chart's page.

Alaska had 26,857 earthquakes of magnitude 3 or more in the 10 years through 2025, 6.6 times California's 4,059. Hawaii (3,374) and Oklahoma (1,244) come next. Each quake counts for the state USGS names in its location, including quakes just offshore, such as Oregon's.

Questions to discuss

  1. In one sentence of your own, what does this chart show?
  2. Find the biggest change or difference in the chart. What might explain it?
  3. Who collected these numbers, and how recent are they? What else would you want to know before drawing a conclusion?

Source: U.S. Geological Survey, ANSS Comprehensive Earthquake Catalog (ComCat) (Public domain (U.S. government work); source U.S. Geological Survey) · Data as of Dec 31, 2025

Open the chart and its numbers

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