Is It Safe to Live Near a Volcano?
ES0907  Frequency of Cascade Eruptions

Layers of ash and mudflows around each volcano have been dated to reconstruct the Cascades’ eruption histories.

  !   Examine the graph to interpret the eruption histories of the Cascades. Which volcano has erupted most frequently? Which volcanoes have erupted in the past 200 years? Do you think any of these volcanoes are extinct, or are they only dormant?

Source: USGS Cascade Volcanoes Observatory

4. Based on the graph, which Cascade volcano would you predict may erupt next? Describe your reasoning.

 


	

 	

		
			
	

	
	

		 
		 	 Step:
		 		
		           
			     
				    
				    
						
	                 	
						 1 
						
		           
			     
				    
				    
						
	                 	
						 2 
						
		           
			     
				    
				    
						
	                 	
						 3 
						
		           
			     
				    
				    
						
	                 	
						 4 
						
		           
			     
				    
				    
						
	                 	
						 5 
						
		           
			     
				    
				    
						
	                 	
						 6 
						
		           
			     
				   7
					
		           
			     
				    
				    
						
	                 	
						 8 
						
		           
			     
				    
				    
						
	                 	
						 9 
						
		           
			     
				    
				    	
						 10 
						
		           
			     
				    
				    	
						 11