# How many seconds per km is thunder?

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## How many seconds per km is thunder?

For metric-system conversions, follow this method: Sound travels at about 340 m/s, so multiply the number of seconds you counted by 340, and you’ll know how many meters away lightning struck. A three-second count, then, would place the lightning strike about 1,020 m away, or roughly 1 km.

## How many seconds does it take to hear thunder?

After you see a flash of lightning, count the number of seconds until you hear the thunder. (Use the stop watch or count “One-Mississippi, Two-Mississippi, Three-Mississippi,” etc.) For every 5 seconds the storm is one mile away. Divide the number of seconds you count by 5 to get the number of miles.

## How many seconds is lightning and thunder km?

The rule of thumb is that every 3 seconds of delay between a flash to thunder, equates to a distance of 1 kilometer, so where 30 second flash-to-thunder time interval, the lightning activity is about 10 km away.

## How far can you hear thunder in KM?

But how far away is thunder when you can actually hear it? Sound waves are partially absorbed by the atmosphere. So the maximum distance is approximately 18 km.

## How do you calculate lightning?

If you count the number of seconds between the flash of lightning and the sound of thunder, and then divide by 5, you’ll get the distance in miles to the lightning: 5 seconds = 1 mile, 15 seconds = 3 miles, 0 seconds = very close. Keep in mind that you should be in a safe place while counting.

## Why does thunder sound like a bomb?

The sound originates at the lightning. The superheated air rapidly expands and then collapses back into itself, that rapid expansion and collapse is the source of the sound. If that happenned at one spot, then all the sound would reach your ears at the same time and you would hear a single explosion.

## How hot is a lightning bolt?

53,540 degrees Fahrenheit
Yep, the answer is a bolt of lightning, which can reach temperatures of roughly 30,000 kelvins (53,540 degrees Fahrenheit). The sun, on the other hand, is eclipsed in this case – its surface temperature is just 6,000 kelvins (10,340 degrees Fahrenheit).

## What are three lightning safety tips?

Protect Yourself from Lightning Strikes

• Immediately get off elevated areas such as hills, mountain ridges, or peaks.
• Never lie flat on the ground.
• Never shelter under an isolated tree.
• Never use a cliff or rocky overhang for shelter.
• Immediately get out of and away from ponds, lakes, and other bodies of water.

## Is really loud thunder bad?

Other than the threat of the lightning itself, does thunder — especially very loud thunder — pose any threat to people near the lightning strike? The shock wave and thunder (at very close range to the lightning bolt) can cause property damage, but no injuries have been reported.

## What is the loudest thunder ever recorded?

A sound of 174 decibels was recorded by barometers 100 miles from Krakatoa. That meant anyone within an 100 mile radius of Krakatoa had a chance of being literally deafened by this sound.

## Which is hotter lightning or lava?

Lightning is way hotter. Lightning is up to 70000 degrees fahrenheit but lava is just 2240 degrees fahrenheit.

## Is lava hotter than the sun?

Lava is indeed very hot, reaching temperatures of 2,200° F or more. But even lava can’t hold a candle to the sun! At its surface (called the “photosphere”), the sun’s temperature is a whopping 10,000° F! That’s about five times hotter than the hottest lava on Earth.

## What is the 30 30 rule for lightning safety?

Lightning 30/30 rule: If it takes less than 30 seconds to hear thunder after seeing the flash, lightning is near enough to pose a threat; after the storm ends, wait 30 minutes before resuming outdoor activities.

## Is it safe to be in a forest during a thunderstorm?

Avoid hilltops, open fields and locations that serve as natural lightning rods, such as a tall, isolated tree in an open area. You never want to be the tallest object in the area or be near to the tallest object in an area. It’s important to note that there’s no safe place outdoors during a thunderstorm.

## Why was the thunder so loud last night 2020?

Late last night (or early this morning), a line of thunderstorms moved across the Piedmont. Because the air was warmer above the ground than it was at the surface, cold air was trapped below and refracted the sound of thunder. …

3 seconds
So sound travels 1 kilometer in roughly 3 seconds and 1 mile in roughly 5 seconds. When you see the flash of a lightning bolt, you can start counting seconds and then divide to see how far away the lightning struck.

Lightning: Lightning Safety Tips

• Be aware. Check the weather forecast before participating in outdoor activities.
• Go indoors. Remember the phrase, “When thunder roars, go indoors.” Find a safe, enclosed shelter when you hear thunder.
• Seek shelter immediately even if caught out in the open.
• Separate.

## How long does it take for the sound of Thunder to travel a mile?

It typically takes the sound of thunder 5 seconds to travel a mile. So, by counting the number of seconds it takes between the flash of lightning and the sound of thunder, you can determine how far you are from the lightning strike.

## How to calculate distance between flash of lightning and sound of Thunder?

Understanding Lightning: Thunder. If you count the number of seconds between the flash of lightning and the sound of thunder, and then divide by 5, you’ll get the distance in miles to the lightning: 5 seconds = 1 mile, 15 seconds = 3 miles, 0 seconds = very close.

## How long does it take to hear thunder after seeing Lightning?

The first 30 is 30 seconds. If it takes less than 30 seconds to hear thunder after seeing a lightning flash, the probability of being struck by lighting is great because the lightning is within 6 miles of your location.

## What does it mean when you hear the sound of Thunder?

If you can hear the sound of thunder, it’s a warning that you’re within striking distance of the storm. When lightning strikes, the air temperature in the lightning path can soar as high as 50,000 degrees Fahrenheit (more than five times hotter than the sun’s surface).