Some USGS information accessed through this page may be preliminary in nature
and presented prior to final review and approval by the Director of the USGS.
This information is provided with the understanding that it is not guaranteed
to be correct or complete, and conclusions drawn from such information are
the sole responsibility of the user.
These are automatic computer generated maps and have not necessarily been
checked by human oversight, so they may contain errors. Further, the input
data for these maps are taken directly from the community of Internet users.
While we make efforts to sort out unusual individual observations, the
“net” product may still contain errors.
These maps are preliminary in nature and they will be updated frequently as
data is supplemented by additional observations. It is important to reload
your browser to see the update.
Locations within the same intensity area will not necessarily experience
the same level of damage since damage depends heavily on the type of
structure, the nature of the construction, and the details of the ground
motion at that site, whereas a CIIM intensity value is intended to represent
an average value for an entire ZIP code region. For this reason more or less
damage than described in the intensity scale may occur.
Intensities assigned by Internet users alone are not official USGS Modified
Mercalli Intensities. While calibrated to agree with the USGS MMI in some
average sense, the should not be considered equivalent to the USGS MMI.
Intensities reaching the damaging range (VI or higher) can only be considered
reliable and authoritative if validated by the designated representative of
the U.S. Geological Survey. This is not the case for these Internet
user-based maps.
At present, the procedure for preparing the CIIM is new and experimental.
Some aspects of the procedure may change in the future.
Privacy Act Statement You are not required to provide your personal
contact information in order to submit your survey. However, if you do not
provide contact information, we may be unable to contact you for additional
information to verify your responses. If you do provide contact information,
this information will only be used to initiate follow-up communications with
you. The records for this collection will be maintained in the appropriate
Privacy Act System of Records identified as Earthquake Hazards Program
Earthquake Information. (INTERIOR/USGS-2) published at 74 FR 34033
(July 14,2009).
Paperwork Reduction Act Statement The Paperwork Reduction Act of 1995
(44 U.S.C. 3501 et. seq.) requires us to inform you that this information is
being collected to supplement instrumental data and to promote public safety
through better understanding of earthquakes. Response to this request is
voluntary. Public reporting for this form is estimated to average 6 minutes
per response, including the time for reviewing instructions and completing
the form. A Federal agency may not conduct or sponsor, and a person is not
required to respond to, a collection of information unless it displays a
currently valid OMB Control Number. Comments regarding this collection of
information should be directed to: Bureau Clearance officer, U.S. Geological
Survey, 807 National Center, Reston, VA 20192.
