What is the 'Natural Gas Storage Indicator - EIA Report'

The Natural Gas Storage Indicator is the U.S. Energy Information Administration's (EIA) estimate of working natural gas volumes held in underground storage facilities at the national and regional levels. The EIA provides weekly estimates of working gas volumes held in underground storage facilities at the Lower 48 states and five regional levels. Changes in these gas inventories on a weekly basis primarily reflect net withdrawals or injections. The report is generally reported every Thursday at 10:30 am EST. Unexpected changes such as above-average withdrawals or injections can have an immediate impact on natural gas prices.

BREAKING DOWN 'Natural Gas Storage Indicator - EIA Report'

The Natural Gas Storage Indicator is a measure of working gas, which is the volume of gas in a reservoir that is above a specified base level, and is the amount of gas that is available for sale to the marketplace. The EIA report shows gas inventories for the reporting week and previous week, as well as the net change, on a national basis and for East, West and Producing regions. It also provides inventories for a year ago and the five-year average for historical comparison.

The overall approach relies on weekly survey data from a sample of operators of underground storage facilities. These data are used to prepare regional and national estimates for all underground storage.

History of the Indicator

Weekly estimates of working gas in storage were first provided by the American Gas Association (AGA) in 1994, however by 2001, the AGA decided that it would discontinue its survey due to resource considerations. The EIA stepped in to fill the information gap to the natural gas market and released its first estimates of underground U.S. natural gas storage for the week ending May 3, 2002.

The Indicator Goal

According to the EIA, the goal of the weekly storage data program is to provide weekly estimates of the level of working gas in underground storage for the United States and five regions. The total volume of natural gas in underground storage reservoirs is classified as either base gas or working gas. Underground storage facilities may be reservoirs in depleted oil and gas fields, aquifers, or salt caverns.

The Natural Gas Storage Indicator is a very important data source for natural gas traders. According to the EIA, upon release of the report, the natural gas market reacts to the derived net change in inventory levels from the prior week. This information on the nature of the net changes between weekly inventory data reports is helpful in informing trading decisions that often move natural gas prices 3 cents to 5 cents per million British thermal units (MMBtu) each week upon release.

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