When a player manages to hold 20,000 MD or more, the player will have a chance of running into an eruption. Eruptions may occur when the player mines a volcano. This can be stopped by using the No Eruption Cards (subscribers only). Depending on the player's stats, the chance of an eruption occurring is 1:50, or 2%. If the player is unlucky enough to run into an eruption, an amount of Mars Dollars between 20 and 2000 is lost.

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