Monday, May 26

• 2.3M Earthquake 17 Kilometers Southwest of Hayfork
• 2.3M Earthquake 17 Kilometers West of Petrolia
• 2.4M Earthquake 23 Kilometers West of Petrolia
• 2.3M Earthquake 24 Kilometers West of Petrolia
• 3.0M Earthquake 22 Kilometers West of Petrolia
• 3.2M Earthquake 20 Kilometers West of Petrolia
• 2.5M Earthquake 20 Kilometers West of Petrolia
• 2.9M Earthquake 14 Kilometers Southwest of Petrolia
• 4.4M Earthquake 51 Kilometers West of Shelter Cove
• 2.5M Earthquake 22 Kilometers West of Petrolia

Sunday, May 25

• 2.9M Earthquake 19 Kilometers West of Petrolia
• 2.3M Earthquake 28 Kilometers East of Willow Creek
• 4.1M Earthquake 39 Kilometers Northwest of Petrolia

Saturday, May 24

• 2.7M Earthquake 32 Kilometers West of Petrolia

Thursday, May 22

• 1.4M Earthquake 7 Kilometers Southwest of Petrolia
• 2.4M Earthquake 71 Kilometers West of Petrolia

Wednesday, May 21

• 2.2M Earthquake 14 Kilometers West of Petrolia

Sunday, May 18

• 2.7M Earthquake 69 Kilometers Northwest of Petrolia

Friday, May 16

• 3.6M Earthquake 37 Kilometers West of Petrolia
• 2.9M Earthquake 19 Kilometers West of Petrolia
• 3.0M Earthquake 25 Kilometers West of Petrolia
• 2.5M Earthquake 35 Kilometers West of Petrolia
• 2.5M Earthquake 33 Kilometers West of Petrolia
• 2.3M Earthquake 56 Kilometers West of Petrolia
• 3.0M Earthquake 32 Kilometers West of Petrolia
• 2.8M Earthquake 34 Kilometers West of Petrolia

Wednesday, May 14

• 2.3M Earthquake 14 Kilometers Northwest of Petrolia

Tuesday, May 13

• 1.9M Earthquake 11 Kilometers West of Petrolia
• 2.6M Earthquake 7 Kilometers Northwest of Willow Creek
• 2.0M Earthquake 16 Kilometers Southwest of Ferndale

Sunday, May 11

• 1.8M Earthquake 19 Kilometers Southwest of Petrolia
• 2.0M Earthquake 15 Kilometers West of Petrolia

Saturday, May 10

• 2.1M Earthquake 32 Kilometers West of Petrolia

Friday, May 9

• 2.6M Earthquake 24 Kilometers West of Petrolia

Thursday, May 8

• 1.9M Earthquake 28 Kilometers Northwest of Petrolia
• 3.6M Earthquake 69 Kilometers Northwest of Petrolia
• 2.4M Earthquake 53 Kilometers Northwest of Petrolia
• 2.7M Earthquake 29 Kilometers West of Petrolia

Wednesday, May 7

• 1.9M Earthquake 3 Kilometers Southeast of Fortuna
• 3.9M Earthquake 63 Kilometers Northwest of Petrolia
• 3.9M Earthquake 151 Kilometers Southwest of Ferndale

Tuesday, May 6

• 2.7M Earthquake 38 Kilometers West of Petrolia

Monday, May 5

• 1.8M Earthquake 10 Kilometers Southwest of Petrolia

Sunday, May 4

• 2.6M Earthquake 41 Kilometers Northwest of Petrolia

Saturday, May 3

• 1.5M Earthquake 14 Kilometers Southeast of Petrolia
• 2.2M Earthquake 13 Kilometers Southeast of Petrolia

Friday, May 2

• 2.6M Earthquake 61 Kilometers Northwest of Petrolia

Thursday, May 1

• 2.3M Earthquake 11 Kilometers South of Bertsch-Oceanview
• 2.2M Earthquake 13 Kilometers South of Bertsch-Oceanview
• 1.8M Earthquake 18 Kilometers Southwest of Ferndale