YNP Thermal Feature: Porkchop Geyser

Thermal Map; Gibbon Canyon (Map) -> Norris Geyser Basin (Map) -> Back Basin -> Porkchop Geyser


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Approximate Location of Porkchop Geyser:

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Porkchop Geyser
YNP Thermal Inventory ID: NBB206
Feature Type: Geyser
Lat: 44.7221235
Lon: -110.7081026
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Porkchop's history is wilder than most. Dramatic behavioral changes have characterized Porkchop Geyser during the last decade. Once a small hot spring that occasionally erupted, silca began to seal the vent causing Porkchop Geyser to become a continuous spouter in the spring of 1985. The force of the spray caused a roar that could be heard at the museum over 660 yards (603m) away. Pressure built beneath the vent until, on September 5, 1989, Porkchop Geyser exploded. Rocks surrounding the old vent were upended and some were thrown more than 216 feet (66m) from the feature. Porkchop Geyser is now a gently rolling hot spring.

*Adapted from the NPS Norris Geyser Basin Trail Guide and the Norris Interactive Map

Data Available:

YNP Thermal Inventory Data

Date	Description	pH	Temp (°C)	Vent Temp (°C)	Conductance (µmhos/cm)
08/13/1998		6.64	41.5	0	2200

USGS Geochemical Data¹

YNP RCN Participant Geochemical Data

*Indicates an unofficial name

Note: The YNP RCN is working closely with the YNP Spatial Analysis Center to provide the most accurate and up-to-date information on geothermal features, however, errors do exist. Any questions or concerns regarding features found on this site should be directed to the YNP RCN before contacting the Spatial Analysis Center.