Random Colonization Events.
I've noticed that there are only two events happening when yo colonize a new world.
I'd thought I'd expand on this so here is an additional event:

You can have it by adding this entry to the GameEventDefs.xml under data\Game
- <GameEvent>
- <InternalName>GeologicInstabilityEvent</InternalName>
- <DisplayName>GEOLOGIC_INSTABILITY_EVENT_LABEL</DisplayName>
- <Description>GEOLOGIC_INSTABILITY_EVENT_DESC_LABEL</Description>
- <WindowTitle>GEOLOGIC_EVENT_LABEL</WindowTitle>
- <ArtDefine>homescreen_background.bk2</ArtDefine>
- <Type>ColonizeEvent</Type>
- <Weight>10</Weight>
- <Choice>
- <Type>Benevolent</Type>
- <Description>GEOLOGIC_INSTABILITY_EVENT_BENEV_LABEL</Description>
- <BonusDescription>GEOLOGIC_INSTABILITY_EVENT_BENEV_BONUS</BonusDescription>
- <Trigger>
- <OnEvent>OnEventChoice</OnEvent>
- <Target>
- <TargetType>Faction</TargetType>
- </Target>
- <Lifetime>Instant</Lifetime>
- <Modifier>
- <EffectType>CultureBenevolent</EffectType>
- <Target>
- <TargetType>Faction</TargetType>
- </Target>
- <BonusType>Flat</BonusType>
- <Value>10.0</Value>
- </Modifier>
- </Trigger>
- <Trigger>
- <OnEvent>OnEventChoice</OnEvent>
- <Target>
- <TargetType>Planet</TargetType>
- </Target>
- <Lifetime>Target</Lifetime>
- <Modifier>
- <EffectType>Tourism</EffectType>
- <Target>
- <TargetType>Colony</TargetType>
- </Target>
- <BonusType>Multiplier</BonusType>
- <Value>0.24</Value>
- </Modifier>
- </Trigger>
- <Trigger>
- <OnEvent>OnEventChoice</OnEvent>
- <Target>
- <TargetType>Planet</TargetType>
- </Target>
- <Lifetime>Target</Lifetime>
- <Modifier>
- <EffectType>Influence</EffectType>
- <Target>
- <TargetType>Colony</TargetType>
- </Target>
- <BonusType>Multiplier</BonusType>
- <Value>0.17</Value>
- </Modifier>
- </Trigger>
- <Trigger>
- <OnEvent>OnEventChoice</OnEvent>
- <Target>
- <TargetType>Planet</TargetType>
- </Target>
- <Lifetime>Target</Lifetime>
- <Modifier>
- <EffectType>MaxManufacturing</EffectType>
- <Target>
- <TargetType>Colony</TargetType>
- </Target>
- <BonusType>Multiplier</BonusType>
- <Value>-0.12</Value>
- </Modifier>
- </Trigger>
- </Choice>
- <Choice>
- <Type>Neutral</Type>
- <Description>GEOLOGIC_INSTABILITY_EVENT_NEUTRAL_LABEL</Description>
- <BonusDescription>GEOLOGIC_INSTABILITY_EVENT_NEUTRAL_BONUS</BonusDescription>
- <Trigger>
- <OnEvent>OnEventChoice</OnEvent>
- <Target>
- <TargetType>Faction</TargetType>
- </Target>
- <Lifetime>Instant</Lifetime>
- <Modifier>
- <EffectType>CultureNeutral</EffectType>
- <Target>
- <TargetType>Faction</TargetType>
- </Target>
- <BonusType>Flat</BonusType>
- <Value>10.0</Value>
- </Modifier>
- </Trigger>
- <Trigger>
- <OnEvent>OnEventChoice</OnEvent>
- <Target>
- <TargetType>Planet</TargetType>
- </Target>
- <Lifetime>Target</Lifetime>
- <Modifier>
- <EffectType>MaxManufacturing</EffectType>
- <Target>
- <TargetType>Colony</TargetType>
- </Target>
- <BonusType>Multiplier</BonusType>
- <Value>0.36</Value>
- </Modifier>
- </Trigger>
- <Trigger>
- <OnEvent>OnEventChoice</OnEvent>
- <Target>
- <TargetType>Planet</TargetType>
- </Target>
- <Lifetime>Target</Lifetime>
- <Modifier>
- <EffectType>Food</EffectType>
- <Target>
- <TargetType>Colony</TargetType>
- </Target>
- <BonusType>Multiplier</BonusType>
- <Value>-0.07</Value>
- </Modifier>
- </Trigger>
- </Choice>
- <Choice>
- <Type>Merciless</Type>
- <Description>GEOLOGIC_INSTABILITY_EVENT_MERC_LABEL</Description>
- <BonusDescription>GEOLOGIC_INSTABILITY_EVENT_MERC_BONUS</BonusDescription>
- <Trigger>
- <OnEvent>OnEventChoice</OnEvent>
- <Target>
- <TargetType>Faction</TargetType>
- </Target>
- <Lifetime>Instant</Lifetime>
- <Modifier>
- <EffectType>CultureMerciless</EffectType>
- <Target>
- <TargetType>Faction</TargetType>
- </Target>
- <BonusType>Flat</BonusType>
- <Value>10.0</Value>
- </Modifier>
- </Trigger>
- <Trigger>
- <OnEvent>OnEventChoice</OnEvent>
- <Target>
- <TargetType>Planet</TargetType>
- </Target>
- <Lifetime>Target</Lifetime>
- <Modifier>
- <EffectType>MaxManufacturing</EffectType>
- <Target>
- <TargetType>Colony</TargetType>
- </Target>
- <BonusType>Multiplier</BonusType>
- <Value>0.72</Value>
- </Modifier>
- </Trigger>
- <Trigger>
- <OnEvent>OnEventChoice</OnEvent>
- <Target>
- <TargetType>Planet</TargetType>
- </Target>
- <Lifetime>Target</Lifetime>
- <Modifier>
- <EffectType>Food</EffectType>
- <Target>
- <TargetType>Colony</TargetType>
- </Target>
- <BonusType>Multiplier</BonusType>
- <Value>-0.21</Value>
- </Modifier>
- </Trigger>
- </Choice>
- </GameEvent>
and these entries to the UIText.xml file under data/English/Text
- <StringTable>
- <Label>GEOLOGIC_INSTABILITY_EVENT_LABEL</Label>
- <String>Geologic Instability</String>
- </StringTable>
- <StringTable>
- <Label>GEOLOGIC_INSTABILITY_EVENT_DESC_LABEL</Label>
- <String>When entering orbit our colonists have noticed that this world has a pristine environment with a biodiversity found in few places around the Galaxy. However the planet is just entering a period of increased geologic activity, which means that in a few short years the atmosphere will be polluted by volcanic gasses and the biosphere will begin to die. Upon further consideration the crew has come up with a few options. What would you like them to do?</String>
- </StringTable>
- <StringTable>
- <Label>GEOLOGIC_INSTABILITY_EVENT_BENEV_LABEL</Label>
- <String>Install atmospheric processors to filter out the volcanic gases.</String>
- </StringTable>
- <StringTable>
- <Label>GEOLOGIC_INSTABILITY_EVENT_BENEV_BONUS</Label>
- <String>+10 Benevolent, +17% Influence, +24% Tourism, -12% Production</String>
- </StringTable>
- <StringTable>
- <Label>GEOLOGIC_INSTABILITY_EVENT_NEUTRAL_LABEL</Label>
- <String>Use the excess geothermal energy to boost our production.</String>
- </StringTable>
- <StringTable>
- <Label>GEOLOGIC_INSTABILITY_EVENT_NEUTRAL_BONUS</Label>
- <String>+10 Pragmatic, +36% Production, -7% Food</String>
- </StringTable>
- <StringTable>
- <Label>GEOLOGIC_INSTABILITY_EVENT_MERC_LABEL</Label>
- <String>Some well placed thermonuclear detonations inside the mantle might boost geothermal energy.</String>
- </StringTable>
- <StringTable>
- <Label>GEOLOGIC_INSTABILITY_EVENT_MERC_BONUS</Label>
- <String>+10 Merciless, +72% Manufacturing, -21%Food</String>
- </StringTable>





