1月18日的Earthquake Alert -USA Info应用程序分析

Earthquake early warning refers to the use of the characteristic that the propagation speed of seismic waves is lower than that of radio waves after an earthquake occurs to warn in advance where the seismic waves have not yet arrived. Generally speaking, the propagation speed of seismic waves is a few kilometers per second, while the speed of radio waves is 300,000 kilometers per second. Therefore, if we can use the earthquake information obtained by the real-time monitoring network and the rapid assessment results of the possible scope and degree of damage of the earthquake, we can use the short time before the arrival of destructive seismic waves to issue an early warning. Studies have shown that if the warning time is 3 seconds, the casualty rate can be reduced by 14%; if the warning time is 10 seconds and 60 seconds, the casualties can be reduced by 39% and 95% respectively. Core functions of Earthquake Disaster Warning: [Earthquake Warning] Push instant earthquake warning information a few seconds to tens of seconds in advance when an earthquake occurs, giving you time to avoid danger [Earthquake Quick Report] Covering dozens of data sources such as CENC, USGS, EMSC, JWA, etc., supporting nearly 2 million earthquake data as early as 1900 [Regions of Concern] Add multiple key areas of concern to timely perceive earthquake quick reports in the areas of concern [Push Settings] Supports setting earthquake push notification strategies based on magnitude thresholds, and professionals can monitor all earthquake warning notifications [Earthquake Disaster Warning VIP Automatic Subscription Service Description] 1. Subscription service: VIP weekly subscription for earthquake disaster warning (1 week), VIP monthly subscription for earthquake disaster warning (1 month), VIP annual subscription for earthquake disaster warning (12 months) 2. Subscription price: 12 yuan/week for weekly subscription, 30 yuan/month for monthly subscription, 198 yuan/year for annual subscription 3. Payment: After the user confirms the purchase and payment, the payment will be credited to the iTunes account 4. The Apple iTunes account will be deducted within 24 hours before the expiration date. After the deduction is successful, the subscription period will be extended by one subscription period 5. To cancel the subscription, please open the "Settings" of the Apple phone - enter "iTunes Store and App Store" - click "Apple ID", select "View Apple ID", enter the "Account Settings" page, click "Subscription", and select the Earthquake Disaster Warning app to cancel the subscription. If you close the subscription at least 24 hours before the end of the subscription period, the subscription will automatically renew Privacy Agreement: https://cao1e1c5eyd.feishu.cn/docx/Sd90d4uJpoq5kHxapQncZIAWn5q?from=from_copylink Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/