| Line | Image | Collection | Title |
| 1 | | HCC Maps | Soil Map, California, Eureka Sheet |
| 2 | | HCC Maps | Generalized Geologic Map of Eureka Area, California, Showing Hydrologic Features |
| 3 | | HCC Maps | Geologic Map of the Eel River Valley Area, California, Bulletin 164, Plate 1 |
| 4 | | HCC Maps | Structure Sections Across the Eel River Valley Area, California, Bulletin 164, Plate 2 |
| 5 | | HCC Maps | Reconnaissance Geologic Map of the Hayfork Quadrange, Trinity County, California |
| 6 | | HCC Maps | Trinidad General Plan, Geologic and Soil Limitations |
| 7 | | HCC Maps | Geology and Ground Shaking: Northern California |
| 8 | | HCC Maps | Native American Stories of Earthquakes and Tsunamis Near Redwood National and State Parks |
| 9 | | HCC Maps | Geology of the Cape Mendocino, Eureka, Garberville, and Southwestern Part of the Hayfork, 30x60 minute quadrangles and adjacent offshore area, northen california. Sheet 1: Eureka and Southwestern Hayfork Quadrangles |
| 10 | | HCC Maps | Geology of the Cape Mendocino, Eureka, Garberville, and Southwestern Part of the Hayfork, 30x60 minute quadrangles and adjacent offshore area, northen california. Sheet 2: Cape Mendocino Quadrangle |
| 11 | | HCC Maps | Geology of the Cape Mendocino, Eureka, Garberville, and Southwestern Part of the Hayfork, 30x60 minute quadrangles and adjacent offshore area, northen california. Sheet 3: Garberville Quadrangle |
| 12 | | HCC Maps | Geology of the Cape Mendocino, Eureka, Garberville, and Southwestern Part of the Hayfork, 30x60 minute quadrangles and adjacent offshore area, northen california. Sheet 4: Composite Map |
| 13 | | HCC Maps | Geology of the Cape Mendocino, Eureka, Garberville, and Southwestern Part of the Hayfork, 30x60 minute quadrangles and adjacent offshore area, northen california. Sheet 5: [Key and Notes] |
| 14 | | HCC Maps | Geology of the Cape Mendocino, Eureka, Garberville, and Southwestern Part of the Hayfork, 30x60 minute quadrangles and adjacent offshore area, northen california. Sheet 6: [Diagrams of Subsurface Gorda Plate] |
| 15 | | HCC Maps | [Cliffs of the Humboldt County Coast] |
| 16 | | HCC Maps | Alquist-Priolo Special Studies Zones, Arcata North Quadrangle |
| 17 | | HCC Maps | Alquist-Priolo Special Studies Zones, Arcata South Quadrangle |
| 18 | | HCC Maps | Alquist-Priolo Special Studies Zones, Korbel Quadrangle |
| 19 | | HCC Maps | Alquist-Priolo Special Studies Zones, Hydesville Quadrangle |
| 20 | | HCC Maps | Alquist-Priolo Special Studies Zones, Trinidad Quadrangle |
| 21 | | HCC Maps | Alquist-Priolo Special Studies Zones, Fields Landing Quadrangle |
| 22 | | HCC Maps | Alquist-Priolo Special Studies Zones, Fortuna Quadrangle |
| 23 | | HCC Maps | Alquist-Priolo Special Studies Zones, Hydesville Quadrangle |