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This
portal
provides
information
on
the
hazards
presented
to
the
Gulf
and
Atlantic
coasts
of
the
United
States
by
hurricanes.
A
fact
sheet
summarizes
some
of
the
destructive
effects
and
describes
some
of
the
more
recent
damaging
storms.
Other
links
direct
site
visitors
to
highlighted
resources
describing
the
extent
and
causes
of
coastal
impacts
of
hurricanes,
impacts
on
wetlands,
coastal
changes,
...
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This
set
of
lists
and
maps
provides
information
on
the
latest
earthquakes
for
the
50
states
and
Puerto
Rico.
The
lists
are
organized
by
date
and
time,
and
by
magnitude.
On
the
interactive
maps,
symbols
are
coded
by
size
(larger
symbols
mean
greater
magnitude)
and
by
color
(last
hour,
last
day,
last
week).
Clicking
on
individual
map
symbols
links
to
detailed
maps
and
written
information
for
the
selected
...
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This fact sheet provides an overview of basic scientific facts about landslides. Topics include the different types of landslides, ways that they might be triggered, and how to lessen the effects of landslides on people and structures. A set of links to additional information and some suggested publications are provided. A downloadable, printable version is also available.
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This
is
the
homepage
of
the
United
States
Geological
Survey's
(USGS)
Yellowstone
Volcano
Observatory.
It
features
news
articles,
monitoring
information,
status
reports
and
information
releases,
and
information
on
the
volcanic
history
of
the
Yellowstone
Plateau
Volcanic
Field.
Users
can
access
monthly
updates
with
alert
levels
and
aviation
warning
codes
and
real-time
data
on
ground
deformation,
earthquakes,
...
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This
map
shows
debris
flow
hazard
areas
in
the
United
States,
including
locations
of
known
debris
flows
and
predictions
of
where
future
flows
might
occur.
It
shows
the
locations
of
debris
flows
in
two
different
ways,
as
points
representing
the
locations
of
individual
flows
or
small
groups
of
flows,
and
as
areas
or
polygons
containing
one
or
more
debris
flows.
Different
symbols
are
used
to
indicate
...
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ShakeMaps,
a
product
of
the
United
States
Geological
Survey
(USGS)
Earthquake
Hazards
Program,
are
near-real-time
maps
of
ground
motion
and
shaking
intensity
that
are
produced
following
significant
earthquakes.
They
appear
as
a
set
of
links
keyed
to
areas
which
have
recently
experienced
an
earthquake.
The
maps
display
instrumental
intensity
(modified
Mercalli
scale),
peak
ground
acceleration,
and
...
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This
article
provides
an
overview
of
the
sedimentary
processes
that
occurred
in
the
aftermath
of
the
May
18,
1980
eruption
of
Mount
St.
Helens.
Topics
include
the
vast
quantity
of
easily
erodable
volcanic
deposits,
high
sedimentation
rates
downstream
from
the
volcano,
changes
in
drainage
patterns
caused
by
the
debris
avalanche
that
triggered
the
eruption,
and
some
efforts
to
control
the
downstream
...
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This
virtual
tour
features
three-dimensional
images
from
the
United
States
Geological
Survey's
(USGS)
collection.
It
introduces
visitors
to
the
volcanic
landforms
of
Lava
Beds
National
Monument
in
California,
the
site
of
extensive
recent
and
Quaternary
volcanism.
Features
include
cinder
and
spatter
cones,
lava
flows,
and
the
monument's
extensive
network
of
lava
tubes,
many
of
which
are
open
to
the
...
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This
report
summarizes
the
Volcano
Hazards
Program
of
the
United
States
Geological
Survey
(USGS).
Topics
include
its
goals
and
activities,
some
key
accomplishments,
and
a
plan
for
future
operations.
There
are
also
discussions
of
active
and
potentially
active
volcanoes
in
the
U.S.,
the
role
of
the
USGS
volcano
observatories,
prediction
of
eruptions,
and
potential
danger
to
aircraft
from
volcanic
plumes.
...
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This
portal
provides
access
to
educational
materials
produced
by
the
Cascades
Volcano
Observatory.
The
items
include
news
and
current
events,
information
on
current
activity
of
the
Cascades
volcanoes,
and
emergency
information
in
the
event
of
an
eruption.
There
are
also
frequently-asked-questions
features,
a
glossary,
and
links
to
reading
materials
such
as
fact
sheets
and
reports
of
the
United
States
...
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