Maps

The north-northwest-striking Madison fault is approximately 95 kilometers in length, lying at the confluence of the northeastern Basin and Range province and the Yellowstone tectonic parabola. The fault zone consists primarily of west-dipping normal faults that have east-dipping antithetic faults, which create the Madison Valley graben and several northeast-trending intrabasin faults...

This study documents lidar-illuminated topographic lineaments interpreted as evidence of recent surface fault ruptures and surface ruptures related to distributed deformation along the Bennett Valley Fault Zone and the southernmost Maacama Fault Zone in the northern San Francisco Bay area (fig. 1, on map sheet). Together, these fault zones form a structural connection across a right...

This reference map depicts the Kīlauea summit eruption within Halema‘uma‘u as of January 2, 2025.

This compilation shows thermal maps of Kīlauea summit eruption for December 23-30, 2024.

This thermal map shows eruptive activity on December 30, 2024, within Halemaʻumaʻu crater at the summit of Kīlauea. Lava fountaining and flows were active in the southwest portion of the caldera. Cooler colors (purple, black) show lower temperatures while hotter colors (orange, yellow) show higher temperatures.

New geologic mapping (Wells and others, 2020b) and geophysical mapping (Blakely and others, 2000; McPhee and others, 2014; Wells and others, 2020a) document kilometers of Cenozoic right-lateral offset along the Gales Creek Fault Zone, a major, northwest-striking fault zone forming the boundary between the Tualatin Valley and the Coast Range. The Bureau of Reclamation’s (Reclamation)...