1. What is the Lightning Distance Calculation?

The lightning distance calculation estimates how far away a lightning strike occurred by measuring the time between seeing the lightning and hearing the thunder. Sound travels at about 1 mile per 5 seconds, while light travels almost instantaneously.

2. How Does the Calculator Work?

The calculator uses the simple formula:

Where:

• \( Seconds \) — Time between seeing lightning and hearing thunder
• 5 — Number of seconds sound takes to travel 1 mile

Explanation: For every 5 seconds between the lightning and thunder, the storm is approximately 1 mile away.

3. Importance of Lightning Distance Calculation

Details: Knowing how far away lightning is helps assess danger and determine when to seek shelter. Lightning can strike up to 10 miles from a storm.

4. Using the Calculator

Tips: Count the seconds between seeing lightning and hearing thunder, then enter that number. The calculator will show the approximate distance in miles.

5. Frequently Asked Questions (FAQ)

Q1: Why divide by 5?
A: Sound travels approximately 1 mile in 5 seconds (1,125 feet per second at sea level).

Q2: How accurate is this method?
A: It's a good estimate but can vary slightly with temperature and altitude which affect sound speed.

Q3: When should I seek shelter?
A: When lightning is within 6 miles (30 seconds or less between flash and thunder).

Q4: Can I use kilometers instead?
A: For kilometers, divide seconds by 3 (sound travels ~1 km in 3 seconds).

Q5: Why see lightning before hearing thunder?
A: Light travels much faster than sound (about 874,000 times faster).