Station markers

Icon	Station status
	Station open
	Station closed

Morphology class

Based on the Italian Building Code

• T1 = Flat surface; isolated slopes and cliffs with average slope angle i < 15°
• T2 = Slopes with i > 15°
• T3 = Ridges with crest width significantly less than the base width and 15° < i < 30°
• T4 = Ridges with crest width significantly less than the base width and i > 30°

Ground type EC8

• A = Rock
• B = Very dense sand or gravel or very stiff clay
• C = Dense sand or gravel or stiff clay
• D = Loose to medium cohesionless soil or soft to firm cohesive soil
• E = Surface alluvium layer C or D, 5 to 20 m thick, over a much stiffer material
• S₁, S₂ = ground types requiring special studies

More information can be found here.

Station sensor type

Types: VBB (Very Broad Band), BB (Broad Band), SP (Short Period), SM (Strong Motion) and OBS (Ocean Bottom Sensor)