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icon for How many 5.5 or above earthquakes worldwide September 21 - September 27?

How many 5.5 or above earthquakes worldwide September 21 - September 27?

icon for How many 5.5 or above earthquakes worldwide September 21 - September 27?

How many 5.5 or above earthquakes worldwide September 21 - September 27?

≤6 31%

7 14%

8 14%

9 11%

Polymarket
NEW

≤6 31%

7 14%

8 14%

9 11%

Polymarket
NEW
icon for ≤6

≤6

$281 Vol.

31%

icon for 7

7

$0 Vol.

14%

icon for 8

8

$84 Vol.

14%

icon for 9

9

$110 Vol.

11%

icon for 10

10

$88 Vol.

10%

icon for 11

11

$0 Vol.

8%

icon for 12

12

$0 Vol.

7%

icon for 13

13

$0 Vol.

5%

icon for more than 13

more than 13

$60 Vol.

7%

This market will resolve according to the total number of earthquakes with a magnitude of 5.5 or higher that occur anywhere on Earth between September 21, 2026, 12:00 AM ET and September 27, 2026, 11:59 PM ET. The resolution source for this market is the United States Geological Survey (USGS) Earthquake Hazards Program, with the minimum magnitude set to 5.5 and the date parameters set to the relevant dates for this market's timeframe (https://earthquake.usgs.gov/earthquakes/search/). If an earthquake of substantial size has occurred within this market's timeframe but not yet appeared on the resolution source, this market may remain open until 48 hours after the market's closing time, or until the earthquake in question otherwise appears on the resolution source. If such an earthquake has not appeared on the resolution source by that time, this market will resolve according to the data published at that time. This market may not resolve until the timeframe of this market has concluded. If a qualifying earthquake has been recorded on the final day, this market may remain open for 24 hours to allow for revisions to the recorded magnitude. After 24 hours, this market will resolve according to the latest provided data. If no earthquake data for this market's timeframe has been published on the resolution source by 48 hours after the market's closing time, this market will resolve to the lowest bracket.Global M5.5+ earthquake counts follow a roughly Poisson distribution around a long-term weekly average of roughly 7–10 events, derived from USGS annual rates of about 1,300–1,500 M5–5.9 quakes plus 130–150 M6+ events. Trader sentiment favoring ≤6 outcomes at 31% reflects the high week-to-week variability inherent in global seismicity, where quiet periods are common despite steady plate-boundary strain accumulation. Recent activity, including the September 17 M6.5 in the Aleutian Islands and an M5.5 in the Kermadec region, raises the chance of aftershocks contributing to the September 21–27 tally, while model consensus shows no unusual clustering or swarm activity underway. Key variables include the timing of any new M6+ mainshocks, aftershock decay rates following recent events, and normal fluctuations in subduction-zone seismicity that can shift totals by several events in a single week. USGS monitoring updates and real-time catalogs will provide the primary signals as the resolution window approaches.

This market will resolve according to the total number of earthquakes with a magnitude of 5.5 or higher that occur anywhere on Earth between September 21, 2026, 12:00 AM ET and September 27, 2026, 11:59 PM ET.

The resolution source for this market is the United States Geological Survey (USGS) Earthquake Hazards Program, with the minimum magnitude set to 5.5 and the date parameters set to the relevant dates for this market's timeframe (https://earthquake.usgs.gov/earthquakes/search/).

If an earthquake of substantial size has occurred within this market's timeframe but not yet appeared on the resolution source, this market may remain open until 48 hours after the market's closing time, or until the earthquake in question otherwise appears on the resolution source. If such an earthquake has not appeared on the resolution source by that time, this market will resolve according to the data published at that time.

This market may not resolve until the timeframe of this market has concluded. If a qualifying earthquake has been recorded on the final day, this market may remain open for 24 hours to allow for revisions to the recorded magnitude. After 24 hours, this market will resolve according to the latest provided data.

If no earthquake data for this market's timeframe has been published on the resolution source by 48 hours after the market's closing time, this market will resolve to the lowest bracket.
This market will resolve according to the total number of earthquakes with a magnitude of 5.5 or higher that occur anywhere on Earth between September 21, 2026, 12:00 AM ET and September 27, 2026, 11:59 PM ET. The resolution source for this market is the United States Geological Survey (USGS) Earthquake Hazards Program, with the minimum magnitude set to 5.5 and the date parameters set to the relevant dates for this market's timeframe (https://earthquake.usgs.gov/earthquakes/search/). If an earthquake of substantial size has occurred within this market's timeframe but not yet appeared on the resolution source, this market may remain open until 48 hours after the market's closing time, or until the earthquake in question otherwise appears on the resolution source. If such an earthquake has not appeared on the resolution source by that time, this market will resolve according to the data published at that time. This market may not resolve until the timeframe of this market has concluded. If a qualifying earthquake has been recorded on the final day, this market may remain open for 24 hours to allow for revisions to the recorded magnitude. After 24 hours, this market will resolve according to the latest provided data. If no earthquake data for this market's timeframe has been published on the resolution source by 48 hours after the market's closing time, this market will resolve to the lowest bracket.
Volume
$623
End Date
Sep 28, 2026
Market Opened
Sep 18, 2026, 11:30 AM ET
This market will resolve according to the total number of earthquakes with a magnitude of 5.5 or higher that occur anywhere on Earth between September 21, 2026, 12:00 AM ET and September 27, 2026, 11:59 PM ET. The resolution source for this market is the United States Geological Survey (USGS) Earthquake Hazards Program, with the minimum magnitude set to 5.5 and the date parameters set to the relevant dates for this market's timeframe (https://earthquake.usgs.gov/earthquakes/search/). If an earthquake of substantial size has occurred within this market's timeframe but not yet appeared on the resolution source, this market may remain open until 48 hours after the market's closing time, or until the earthquake in question otherwise appears on the resolution source. If such an earthquake has not appeared on the resolution source by that time, this market will resolve according to the data published at that time. This market may not resolve until the timeframe of this market has concluded. If a qualifying earthquake has been recorded on the final day, this market may remain open for 24 hours to allow for revisions to the recorded magnitude. After 24 hours, this market will resolve according to the latest provided data. If no earthquake data for this market's timeframe has been published on the resolution source by 48 hours after the market's closing time, this market will resolve to the lowest bracket.Global M5.5+ earthquake counts follow a roughly Poisson distribution around a long-term weekly average of roughly 7–10 events, derived from USGS annual rates of about 1,300–1,500 M5–5.9 quakes plus 130–150 M6+ events. Trader sentiment favoring ≤6 outcomes at 31% reflects the high week-to-week variability inherent in global seismicity, where quiet periods are common despite steady plate-boundary strain accumulation. Recent activity, including the September 17 M6.5 in the Aleutian Islands and an M5.5 in the Kermadec region, raises the chance of aftershocks contributing to the September 21–27 tally, while model consensus shows no unusual clustering or swarm activity underway. Key variables include the timing of any new M6+ mainshocks, aftershock decay rates following recent events, and normal fluctuations in subduction-zone seismicity that can shift totals by several events in a single week. USGS monitoring updates and real-time catalogs will provide the primary signals as the resolution window approaches.

This market will resolve according to the total number of earthquakes with a magnitude of 5.5 or higher that occur anywhere on Earth between September 21, 2026, 12:00 AM ET and September 27, 2026, 11:59 PM ET.

The resolution source for this market is the United States Geological Survey (USGS) Earthquake Hazards Program, with the minimum magnitude set to 5.5 and the date parameters set to the relevant dates for this market's timeframe (https://earthquake.usgs.gov/earthquakes/search/).

If an earthquake of substantial size has occurred within this market's timeframe but not yet appeared on the resolution source, this market may remain open until 48 hours after the market's closing time, or until the earthquake in question otherwise appears on the resolution source. If such an earthquake has not appeared on the resolution source by that time, this market will resolve according to the data published at that time.

This market may not resolve until the timeframe of this market has concluded. If a qualifying earthquake has been recorded on the final day, this market may remain open for 24 hours to allow for revisions to the recorded magnitude. After 24 hours, this market will resolve according to the latest provided data.

If no earthquake data for this market's timeframe has been published on the resolution source by 48 hours after the market's closing time, this market will resolve to the lowest bracket.
This market will resolve according to the total number of earthquakes with a magnitude of 5.5 or higher that occur anywhere on Earth between September 21, 2026, 12:00 AM ET and September 27, 2026, 11:59 PM ET. The resolution source for this market is the United States Geological Survey (USGS) Earthquake Hazards Program, with the minimum magnitude set to 5.5 and the date parameters set to the relevant dates for this market's timeframe (https://earthquake.usgs.gov/earthquakes/search/). If an earthquake of substantial size has occurred within this market's timeframe but not yet appeared on the resolution source, this market may remain open until 48 hours after the market's closing time, or until the earthquake in question otherwise appears on the resolution source. If such an earthquake has not appeared on the resolution source by that time, this market will resolve according to the data published at that time. This market may not resolve until the timeframe of this market has concluded. If a qualifying earthquake has been recorded on the final day, this market may remain open for 24 hours to allow for revisions to the recorded magnitude. After 24 hours, this market will resolve according to the latest provided data. If no earthquake data for this market's timeframe has been published on the resolution source by 48 hours after the market's closing time, this market will resolve to the lowest bracket.
Volume
$623
End Date
Sep 28, 2026
Market Opened
Sep 18, 2026, 11:30 AM ET

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Frequently Asked Questions

"How many 5.5 or above earthquakes worldwide September 21 - September 27?" is a prediction market on Polymarket with 9 possible outcomes where traders buy and sell shares based on what they believe will happen. The current leading outcome is "≤6" at 31%, followed by "7" at 14%. Prices reflect real-time crowd-sourced probabilities. For example, a share priced at 31¢ implies that the market collectively assigns a 31% chance to that outcome. These odds shift continuously as traders react to new developments and information. Shares in the correct outcome are redeemable for $1 each upon market resolution.

"How many 5.5 or above earthquakes worldwide September 21 - September 27?" is a newly created market on Polymarket, launched on Sep 18, 2026. As an early market, this is your opportunity to be among the first traders to set the odds and establish the market's initial price signals. You can also bookmark this page to track volume and trading activity as the market gains traction over time.

To trade on "How many 5.5 or above earthquakes worldwide September 21 - September 27?," browse the 9 available outcomes listed on this page. Each outcome displays a current price representing the market's implied probability. To take a position, select the outcome you believe is most likely, choose "Yes" to trade in favor of it or "No" to trade against it, enter your amount, and click "Trade." If your chosen outcome is correct when the market resolves, your "Yes" shares pay out $1 each. If it's incorrect, they pay out $0. You can also sell your shares at any time before resolution if you want to lock in a profit or cut a loss.

The current frontrunner for "How many 5.5 or above earthquakes worldwide September 21 - September 27?" is "≤6" at 31%, meaning the market assigns a 31% chance to that outcome. The next closest outcome is "7" at 14%. These odds update in real-time as traders buy and sell shares, so they reflect the latest collective view of what's most likely to happen. Check back frequently or bookmark this page to follow how the odds shift as new information emerges.

The resolution rules for "How many 5.5 or above earthquakes worldwide September 21 - September 27?" define exactly what needs to happen for each outcome to be declared a winner — including the official data sources used to determine the result. You can review the complete resolution criteria in the "Rules" section on this page above the comments. We recommend reading the rules carefully before trading, as they specify the precise conditions, edge cases, and sources that govern how this market is settled.