Monitoring Earthquakes
The record of an earthquake' seismic waves produced by a seismograph.
What is the Ring of Fire?
A major belt of volcanoes that rims the Pacific Ocean.
A large, underground pool of molten or partially magma located within the Earth's crust.
What is the definition of Composite volcano?
A steep-sided, symmetrical cone built of alternating layers of hardened lava and volcanic ash.
How do Seismographs Work?
Seismic waves cause a simple seismograph's drum to vibrate, which in turn causes the pen to record the drum's vibrations.
Where do Volcanoes Form?
Volcanic belts form along the boundaries of Earth's plates.
What are the stages of Volcanic Activity?
Geologists often use the terms active, dormant, or extinct to describe a volcano's stage of activity.
What Landforms Do Lava and Ash Create?
Volcanic eruptions create Landforms made of lava, ash, and other materials.
Where Do the most Earthquake's Happen?
The Ring of Fire
What happens During a Hot Spot?
A volcano forms above a Hot spot when magma erupts through the crust and reaches the surface.
What is the difference between quiet and explosive Eruptions?w
Gas content and magma thickness
What Landforms does Magma Create?
Features formed by magma include volcanic necks, diikes, and sills.
What Patterns Do Seismographic Data Reveal?
But from past seismographic data, geologists have created maps of where earthquakes occur around the world. The maps show that earthquakes often occur along plate boundaries.
Where are Volcanoes Found on Earth's surface?
Along the Ring of Fire because of the intense movement of tectonic plates.
What are the two types of volcanic Eruptions?
Geologists classify volcanic Eruptions as quiet or explosive.
Dikes are harsh, meaning they cut vertically or steeply while sills are concordant are consistent, running parallel.
How do you Measure a Seismic wave?
What is the difference between Diverging Boundaries and Converging Boundaries?
Converging is where tectonic plates collide, creating mountains, and trenches while divergent occurs when diverging boundaries move apart.
What happens during a Volcanic Eruption?
When a volcano erupts, the force of the expanding gases pushes the magma chamber through the pipe until it flows or explodes out of the vent.
How do Batholiths form?
High temperatures and pressures, typically at plate boundaries, melt the crust or mantle, creating magma that rises through denser rock.