Editing 2219: Earthquake Early Warnings

Jump to: navigation, search

Warning: You are not logged in. Your IP address will be publicly visible if you make any edits. If you log in or create an account, your edits will be attributed to your username, along with other benefits.

The edit can be undone. Please check the comparison below to verify that this is what you want to do, and then save the changes below to finish undoing the edit.
Latest revision Your text
Line 8: Line 8:
  
 
==Explanation==
 
==Explanation==
 +
{{incomplete|Created by a SPOILED EARTHQUAKE. Please mention here why this explanation isn't complete. Do NOT delete this tag too soon.}}
 +
 
A week before this comic, on October 17th, California introduced an {{w|earthquake warning system}} in the form of an [https://www.latimes.com/california/story/2019-10-16/california-to-launch-statewide-earthquake-early-warning-system app for smartphones called MyShake].
 
A week before this comic, on October 17th, California introduced an {{w|earthquake warning system}} in the form of an [https://www.latimes.com/california/story/2019-10-16/california-to-launch-statewide-earthquake-early-warning-system app for smartphones called MyShake].
 
The system works through a network of sensors across the state that can detect {{w|P-waves}} from an {{w|earthquake}}, {{w|P-wave#As_an_earthquake_warning|which move faster}} than the {{w|S-waves}}, which cause most of the damage. In addition, the sensors send the warning electronically - at a significant fraction of the speed of light - much faster than either P-waves or S-waves. Because of these differences in speed, the network can send warnings through the app about 5-20 seconds before major shaking occurs, enough time for people to take cover under tables, run outside, etc. The farther you are away from the epicenter, the more warning time you have.
 
The system works through a network of sensors across the state that can detect {{w|P-waves}} from an {{w|earthquake}}, {{w|P-wave#As_an_earthquake_warning|which move faster}} than the {{w|S-waves}}, which cause most of the damage. In addition, the sensors send the warning electronically - at a significant fraction of the speed of light - much faster than either P-waves or S-waves. Because of these differences in speed, the network can send warnings through the app about 5-20 seconds before major shaking occurs, enough time for people to take cover under tables, run outside, etc. The farther you are away from the epicenter, the more warning time you have.

Please note that all contributions to explain xkcd may be edited, altered, or removed by other contributors. If you do not want your writing to be edited mercilessly, then do not submit it here.
You are also promising us that you wrote this yourself, or copied it from a public domain or similar free resource (see explain xkcd:Copyrights for details). Do not submit copyrighted work without permission!

To protect the wiki against automated edit spam, we kindly ask you to solve the following CAPTCHA:

Cancel | Editing help (opens in new window)