Intensity Lab
MMI Scale › Level II
II

Weak

Weak shaking · None damage potential

PGA
0.05 – 0.29 %g
PGV
0.1 – 1.1 cm/s
I II III IV V VI VII VIII IX X

Felt only by a few persons at rest, especially on upper floors of buildings.

Effects

People & Response

  • Felt by few people, especially on upper floors
  • Sensation of dizziness or nausea reported by some
  • Those at rest are more likely to feel it

Objects & Furnishings

  • Delicately suspended objects swing slightly
  • No rattling of windows or dishes

Structures & Environment

  • No damage to structures
  • Upper floors of tall buildings respond more
Typical PGA (ShakeMap) 0.05 – 0.29 %g
Typical PGV (ShakeMap) 0.1 – 1.1 cm/s
PGA/PGV ranges are approximate; values overlap between adjacent levels. See Instrumental Intensity for details.

Video Example

MMI II shaking example video thumbnail
Watch on YouTube ↗
← I Not Felt Weak III →

Descriptions are verbatim from the USGS MMI Scale, based on Wood & Neumann (1931) and Richter (1958). Source: USGS Modified Mercalli Intensity Scale .

Instrumental intensity values and PGA/PGV ranges from USGS ShakeMap V4 Technical Documentation (Worden et al.). Intensity Lab reports MMI derived via the Worden et al. (2012) GMICE, interpolated from USGS ShakeMap. PGA/PGV ranges are approximate; actual values overlap between adjacent levels.