_______________      

craters on fire      

¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯      



                                                                                    
-----------------------------------                                                 
                                   |                                                
                                   |                                                
                                   |                                                
                                   |                                                
                                   |                                                
                                   |                                                
                                   |                                                
                                    -------------------> volcanic deflation         
                                                         ¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯