Bring Textbook Diagrams to Life! A 3D Google Earth Lesson to Visualize Earthquake Depths
Hi, I’m Ken Kuwako, Science Trainer. Every day is an experiment.
“Teacher, why does Japan have so many earthquakes?”
When covering changes in the Earth’s crust in a science class, have you ever been asked such a simple yet profound question by a student? When we hear about an earthquake on the news—”the epicenter was X kilometers deep”—it’s hard to visualize the dynamic movements happening beneath our feet using just numbers and flat maps.
But what if you could view the epicenters of past earthquakes around the globe as if you were looking through the Earth from space, in 3D, vividly color-coded by depth? Students’ eyes would light up, and textbook content would instantly transform into the fascinating reality of the planet we live on.
Today, I’m introducing a powerful technique that makes this experience possible: combining Google Earth with earthquake data from the USGS (U.S. Geological Survey). The process is surprisingly simple and allows us to “see” the invisible activity deep within the Earth. Give this a try in your next class or at home with your family!
See the Earth’s Pulse: Google Earth Setup Guide
Here is how to map earthquakes that have occurred worldwide onto Google Earth. We will use the website of the USGS (U.S. Geological Survey), which covers global earthquake data. Don’t worry about the English site; the procedure is straightforward.
First, navigate to the USGS data distribution page here:
https://earthquake.usgs.gov/earthquakes/feed/v1.0/kml.php
Look for the option “Colored by Depth” in the menu on the right side of the screen. This is where you download the KML file (the data format Google Earth uses). For this example, let’s select “Past 30 Days, M2.5+ Earthquakes.”
Once the file is downloaded, open Google Earth. The browser version is perfectly fine; no app installation is necessary. Once the Earth appears, click the three-line menu icon in the upper left corner and select “Projects.”
Click the “Open” button, choose “Import KML file from your computer,” and select the file you just downloaded.
What happens next is amazing! Countless dots will suddenly float onto the beautiful blue Earth. These dots mark the locations where our planet has “shaken” recently.
More Than a Map! What “Depth” Reveals About Earth’s Secrets
The best part of this data is that the dots are color-coded by the depth of the epicenter (“Colored by Depth”). Generally, orange and red indicate shallow quakes, while purple and blue signify deeper ones. Here are the key scientific takeaways for leveraging this data in learning:
1. Visualize the “Seismic Hotspots”
If you zoom out, it becomes clear that earthquakes aren’t random; they cluster in specific belts. The famous “Ring of Fire” will stand out vividly. Asking “Why are there so many earthquakes here?” naturally leads into a discussion of plate tectonics.
2. Feel the Subduction of Plates (Wadati-Benioff Zone)
This is the true highlight! Zoom in on the area around the Japanese archipelago. You will see shallow quakes (red/orange) near the Japan Trench (ocean side), and as you move across the island toward the continent, the epicenters become progressively deeper (blue/green). This stunning visualization is proof that the oceanic plate is subducting (sliding) under the continental plate. The “subduction zone” or “Wadati-Benioff zone” you see in textbook cross-sections appears before your eyes as real-world data! Students often exclaim, “Wow, it really is sinking!”
3. Turn Science into Personal Awareness
By reviewing the earthquake distribution around your home region, you gain an objective understanding of the seismic activity in your area. This visual impact is crucial for developing a responsible awareness of disaster prevention, shifting the topic from abstract theory to personal reality.
Instead of just looking at flat maps, this allows you to virtually “touch” the Earth by spinning and manipulating the globe. This interactive learning experience is key to sparking curiosity and deepening scientific understanding. Please incorporate this into your lessons, and join your students in unraveling the mysteries of our dynamic planet!
You can also check out this video for a demonstration of the actual steps:
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