Activity from 2/6-2/7:
At the summit, at Halema`uma`u crater there was lava spattering in at least two places in the bottom of the crater, and the lava level was rising. Inflation of the summit that had been occurring was decreased. There were seven earthquakes beneath Kilauea that were able to be located.
At the Pu`u`O`o crater there also a decrease in inflation that had been occurring. Seismic activity at both the Pu`u`O`o vent and TEB vent was low.
Seismic activity and earthquakes are important to scientists when they are study volcanoes. You can click here to see a map of recent earthquakes on the island of Hawaii. Then, click here to read about monitoring seismic activity near volcanoes, and use the information from this website to respond to either one of the two prompts below.
- What happens in a volcano to trigger earthquakes?
- How do scientist measure seismic activity at volcanoes?
16 comments:
When the cracks vibrate either low frequency earthquakes or a continuous shaking called volcanic tremor is triggering.
Scientist detects subtle and significant variation in the type and intensity of seismic activity an eruption is occurring.
Tatum B
What happens in a volcano to trigger an earthquake is magma and volcanic gases push towards the surface causing the surrounding rock to tremble or break.
Victoria R.
Lava rises and pushes cracks or breaks in the rock that makes up the vent which makes high or low-frequency earthquake. A high-frequency earthquake is when a rock breaks. A low-frequency earthquake is when the rock cracks. A volcanic tremor is also when the rock cracks, but it shakes continuously. The earthquakes are not usually above a two or three magnitude and are less than 10kn beneath a volcano.
I learned that scientists measure sceismic waves by a volcano by a seismometer. A seismometer is something that measures the ground vibrations, most likely caused by an earthquake.
Magma and volcanic gas first force up through shallow underground passageways or fratures. The way magma and volcanic gases move cause rocks to break or rocks to vibrate. Earthquakes are triggered when rocks break in high-frequency.
Summer N. B1
Earthquakes happen in a volcano when the magma and gases try to move up the shallow passageways. While they are moving, they will cause the rock to break, the cracks to vibrate. These earthquakes are usually a 2 or 3 magnitude.
Sydney M.
Scientists measure earthquakes caused by volcanoes by using seismometers.Seismometers are located all around the volcano where it can measure any vibrations that occur,typically earthquakes.Scientists will place 4-8 of these seismometers around the volcano's vent. Most of these earthquakes are below a magnitude of 3. These earthquakes are caused by the movement of magma breaking the rock. Measuring these earthquakes,can help scientists know when a volcano may erupt.
Emma C. A3
Shield volcanoes are just like what its name says it is. They are huge volcanoes with broad, low inclined slopes. The sides look like shields. This look came from liquid or fluid lava flow building up over and over again. They look more flat and rounded than other volcanoes . Lava comes from a control vent or a group of vents.
- Zara N.
Scientist measure seismic activity by seismometers around the volcano. They set 4 to 8 seismometers around 20km away from the volcano. These instruments can detect earthquakes smaller then 1 and 2 magnitudes. But if installed at 50km away these tiny earthquakes can go undected. A seismometer is made of many different instruments. This is how scientist measure seismic activity around volcanoes.
-Tyler M.
earthquakes are caused my volcanos when the magma and gasses attemp to move up the skinny passageways in the volcano. when they move, they cause the rocks to crack and break, causing an earthquake
1.Volcanic activity always increses before an eruption because magma and volcanic gases must force their way up the pipe before a volcano can erupt.
2.Scientists measure seismic activity around the volcano by placing 4-8 seismograms around 20 kilometers away from the vent. The seismograms can measure the activity.
The scientist first place 4-8 seismometers about 20 km away. A seismometer is a instrument that measures the ground vibrations.
Question 1: What happens in a volcano to trigger earthquakes?
Answer: What happens to a volcano that triggers and earthquake is when magma and volcanic gas build up and break the passage ways under the Earth’s surface.
Dylan R.
Question 1: What happens in a volcano to trigger earthquakes? Magma and gas build up and force their way to the top and the gas and magma push on the sides of the chamber, creating a earthquake.
For a volcano to trigger earthquakes, volcanic gases push toward the surface and make the rock break.
When a volcano is about to erupt, magma must force its way through underground fractures. This causes earthquake activity below a volcano to increase. Since the magma is moving, it causes rocks to break or cracks to vibrate in the volcano. High-frequency earthquakes are triggered when the rocks break, while low-frequency earthquakes or continuous shaking called volcanic tremors are triggered when the cracks vibrate.
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