MODIFIED MERCALLI INTENSITY VALUE VII
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Description of Shaking Severity: Strong
Summary Description Used on Maps: Nonstructural Damage
Full Description: Difficult to stand. Noticed by drivers of motor cars. Hanging objects quiver. Furniture broken. Damage to masonry D (see previous page for definition), including cracks. Weak chimneys broken at roof line. Fall of plaster, loose bricks, stones, tiles, cornices (also unbraced parapets and architectural ornaments). Some cracks in masonry C (see previous page for definition). Waves on ponds; water turbid with mud. Small slides and caving in along sand or gravel banks. Large bells ring. Concrete irrigation ditches damaged.

Full descriptions are from: Richter, C.F., 1958. Elementary Seismology. W.H. Freeman and Company, San Francisco, pp. 135-149; 650-653.

 


Artwork is courtesy of the Campagna Mulitmediale di Informazione of the Osservatorio Geofisico Sperimentale in Italy ("Italia"). Molto gracie.

jbp 9/18/03