yego.me
💡 Stop wasting time. Read Youtube instead of watch. Download Chrome Extension

Natural hazards | Earth and society | Middle school Earth and space science | Khan Academy


4m read
·Nov 10, 2024

Before I go to a new place, I tried to do some thorough research about it. What do I want to do there? What's the weather forecast? What's the chance that it might erupt? I learned this the hard way recently while preparing for a trip to Mount Rainier National Park. I somehow missed that the mountain itself is actually a volcano; though it hasn't erupted in over a century, it has the potential to do so again. Something that it would have been nice to know more than a week before I left for my vacation.

Volcanoes are one of the most dramatic examples of a natural hazard, a naturally occurring phenomenon that can pose risks to humans and society. Natural hazards can be very dangerous for our communities, but scientists can help people better understand the risks that may occur where they live, so everyone can work together to prepare safety guidelines. Different places experience different natural hazards due to local geographic or atmospheric conditions. For example, a storm on open plains could spawn a tornado. Similarly, a storm over the ocean could grow into a hurricane or a cyclone by the time it reaches the coast.

These coastal rainstorms, along with their colder counterparts, blizzards, are the main natural hazards that I may run into where I live in the Mid-Atlantic. Too much rain or snow can be dangerous, of course, but scientists have gotten pretty good at predicting weather conditions. Meteorologists use all kinds of technologies to map where and when a storm may form. Orbiting satellites can take pictures of cloud patterns from above. Weather stations back on the surface can use electromagnetic wave fields measured through Doppler radar to determine how heavy rain is falling or how strongly wind is blowing in those same clouds.

They feed all of this and other data into computer models that can help them predict if the storm is severe enough to become a natural hazard. For example, this map from the National Oceanic and Atmospheric Administration's Weather Prediction Center shows where people can expect rainstorms, where others can expect snowstorms, and where those storms may become powerful enough to pose risks. Despite great advances in our ability to predict natural hazards, there are some phenomena that are less predictable, which can make them harder to prepare for.

You see, the outer part of Earth is made up of large moving pieces called tectonic plates. These plates can grind or slip against each other, releasing energy in the form of seismic waves. Most of the time, we don't even notice these tectonic movements, but especially along boundaries or fault lines in the plates, people may experience the ground shaking tremors of earthquakes. Earthquakes can be especially dangerous in highly populated areas, where they damage buildings, roads, and other forms of human infrastructure.

Earthquakes are often associated with volcanic activity since volcanoes are also found near boundaries and fault lines of the tectonic plates. As the plates move and magma swells up to the surface, volcanic eruptions can release everything from clouds of gas or ash to rivers of molten lava. An earthquake in one location may even agitate large bodies of water enough to generate a tsunami, a huge and powerful wave along a coastline. In another, tsunamis can affect the local region as well as regions far away.

Scientists can't predict an intense earthquake, volcanic eruption, or tsunami as effectively as they can a severe weather event, but they are working to better understand Earth's seismic activity and when it poses a risk. For example, they use tools like seismographs to determine when an earthquake is happening and its strength or magnitude. Data from both minor and major tremors may help scientists figure out the signs that an earthquake is coming, giving communities along fault lines an early warning to evacuate or brace themselves, rather than simply reacting to the aftermath.

Engineers can even use the data they've recorded from past earthquakes to design buildings and other structures to withstand the effects of future ones. Communicating what they've learned may help places that experience seismic natural hazards to prepare far in advance, further reducing the risk that they face. Natural hazards can cause a lot of harm, but scientists are learning more every day about why they occur and how communities can remain resilient.

For my trip, I studied up on visiting a volcano zone and was relieved to find that there's been no signs that Mount Rainier is erupting anytime soon. The whole experience really reinforced the importance of being prepared. Even if natural hazards aren't common where you live or travel, having a preparedness plan can help you stay safe in a scary situation. These are just some examples of how scientific research benefits society. Now, if you'll excuse me, I'll be setting up an emergency kit for the next time I lose power during a storm.

More Articles

View All
There Is No End of Science
That’s an excellent example of what’s called a crucial test, which is sort of the pinnacle of what science is all about. If we do a test and it doesn’t agree with a particular theory that we have, that’s problematic. But that doesn’t mean that it refutes …
Bad Investing Mistakes That Make Me Cringe...
Hey guys, welcome back to the channel! In this video, we’re going to be talking about three specific investing mistakes that, in all honesty, these ones like really make me cringe. Like, not gonna lie! And in all honesty, I see people make these mistakes …
The Challenges with Cancer Trials | Breakthrough
ANDRE CHOULIKA: We didn’t have any intention of injecting these type of vials to patient because we needed a lot of vials to be able to file our clinical trial application. And this was planned to be done with the University College London. NARRATOR: Bef…
Passing Obama’s Stimulus Bill | Obama: The Price of Hope
NARRATOR: Obama needs just two Republican senators to defy their party. He turns to the veteran leader of the Senate Democrats. None of the Republicans who wanted to do something to help wanted to be the 60th vote. So I had to get 61 votes on everything. …
Causes of shifts in currency supply and demand curves | AP Macroeconomics | Khan Academy
Talk a little bit about what could cause the supply or demand curve for a currency to shift. So here we have the foreign exchange market for the Chinese yuan, which is why we have the quantity of one on the horizontal axis and the price of one in terms o…
Hyperinflation Explained: The 100 TRILLION Dollar Banknote
I’ve got something cool to show you guys today. Something that came in the mail just the other day. Most people wouldn’t get excited about this, but I’m actually pretty excited about it. I’ll show you a close-up. This is it! That right there is a 100 tril…