Alaska Earthquake Center Quarterly Technical Report October-December 2022

This series of technical quarterly reports from the Alaska Earthquake Center (AEC) includes detailed summaries and updates on Alaska seismicity, the AEC seismic network and stations, field work, our social media presence, and lists publications and presentations by AEC staff. Multiple AEC staff members contribute to this report. It is issued in the following month after the completion of each quarter Q1: January-March, Q2: April-June, Q3: July-September, and Q4: October-December. The first report was published for January-March, 2021.1. Introduction 2. Seismicity 3. Field network 4. Data Quality assurance 4.1 Seismic data 4.2 Environmental data 5. Real-time earthquake detection system 6. Computer systems 6.1 Computer resources 6.2 Waveform storage 6.3 Metadata 6.4 Software development 7. Fieldwork 8. Social media and outreach 8.1. Website 8.2. Twitter 8.3. Facebook Page 9. Publications and presentations 9.1. Publications 9.2. Public Presentations 9.3. Lunch Seminar Talks 10. References Appendix A: Data availability for broadband stations from the AK network. Appendix B: Gaps for broadband stations from the AK network

Alaska Earthquake Center Quarterly Technical Report April-June 2024

This series of technical quarterly reports from the Alaska Earthquake Center (AEC) includes detailed summaries and updates on Alaska seismicity, the AEC seismic network and stations, fieldwork, our online presence, and lists publications and presentations by AEC staff. Multiple AEC staff members contribute to this report. It is issued within 1-2 months after the completion of each quarter Q1: January-March, Q2: April-June, Q3: July-September, and Q4: October-December. The first report was published for January-March, 2021.1. Introduction 2. Seismicity 3. Alaska Geophysical Network 4. Data quality assurance 4.1 Seismic data 4.2 Environmental data 5. Real-time earthquake detection system 6. Computer systems 6.1 Computer resources 6.2 Waveform storage 6.3 Metadata 6.4 Software development 7. Fieldwork 8. Social media and outreach 8.1 Website 8.2 Twitter/X 8.3 Facebook and Instagram 8.4 LinkedIn 28 8.5 K–12 and community outreach 8.6 Workforce development 9. Publications and presentations 9.1 Publications 9.2 Public presentations 9.3 GI Geoscience lunch seminar talks 10. References Appendix A: Data availability for broadband stations from the AK network. Appendix B: Gaps for broadband stations from the AK network

Alaska Earthquake Center Quarterly Technical Report January-March 2024

This series of technical quarterly reports from the Alaska Earthquake Center (AEC) includes detailed summaries and updates on Alaska seismicity, the AEC seismic network and stations, fieldwork, and our online presence, and lists publications and presentations by AEC staff. Multiple AEC staff members contribute to this report. It is issued in the following month after the completion of each quarter Q1: January-March, Q2: April-June, Q3: July-September, and Q4: October-December. The first report was published for January-March, 2021.1. Introduction 2. Seismicity 3. Alaska Geophysical Network 4. Data quality assurance 4.1 Seismic data 4.2 Environmental data 5. Real-time earthquake detection system 6. Computer systems 6.1 Computer resources 6.2 Waveform storage 6.3 Metadata 6.4 Software development 7. Fieldwork 8. Social media and outreach 8.1 Website 8.2 Twitter/X 8.3 Facebook and Instagram 8.4 LinkedIn 8.5 K–12 and community outreach 9. Publications and presentations 9.1 Publications 9.2 Public presentations 9.3 GI Geoscience lunch seminar talks 10. References Appendix A: Data availability for broadband stations from the AK network. Appendix B: Gaps for broadband stations from the AK network

2022 Alaska Seismicity Summary

The Alaska Earthquake Center reported 47,045 seismic events in Alaska and neighboring regions in 2022. The largest earthquake was a magnitude 6.8 event that occurred on January 11 in the Fox Islands region of the Aleutian Islands. Other active spots include two M6.3 earthquakes in the Rat Islands on June 4 and December 14, both of which were followed by moderate aftershock sequences. A magnitude 5.4 earthquake was recorded in an unusual location in the Bering Sea, east of St. George Island, on July 4. The two largest earthquakes in mainland Alaska, both magnitude 5.2, occurred in the Yakutat Bay region on January 8 and in central Alaska on February 6. We continued to monitor ongoing activity within the 2018 M7.1 Anchorage, 2018 M6.4 Kaktovik, 2018 M7.9 Offshore Kodiak, 2020 M7.6 Simeonof, and 2021 M8.2 Chignik aftershock sequences, the Purcell Mountains earthquake swarm, and the Wright Glacier cluster northeast of Juneau. All aftershock sequences continued to slow down compared to the previous years.1. Abstract 2. Introduction 3. Notable earthquakes and sequences of 2022 3.1. January 11 M6.8 and M6.6 and January 22 M6.2 earthquakes in Fox Islands 3.2. June 4 M6.3 and December 14 M6.3 earthquakes in Rat Islands 3.2. July 4 M5.4 in Pribilof Islands 4. Ongoing aftershock sequences and swarms 4.1. 2021 M8.2 Chignik aftershock sequence 4.2. 2020 M7.8 Simeonof aftershock sequence 4.3. 2018 M7.1 Anchorage aftershock sequence 4.4. 2018 M6.4 Kaktovik aftershock sequence 4.5. 2018 M7.9 Offshore Kodiak aftershock sequence 4.6. Purcell Mountains earthquake swarm 5. Glacial seismicity and Wright Glacier cluster 6. Acknowledgments 7. Reference

Alaska Earthquake Center Quarterly Technical Report January-March 2022

This series of technical quarterly reports from the Alaska Earthquake Center (AEC) includes detailed summaries and updates on Alaska seismicity, the AEC seismic network and stations, field work, our social media presence, and lists publications and presentations by AEC staff. Multiple AEC staff members contribute to this report. It is issued in the following month after the completion of each quarter Q1: January-March, Q2: April-June, Q3: July-September, and Q4: October-December. First report was published for January-March, 2021.Contents 1 Introduction 2 Seismicity 2 Field network 9 Data Quality assurance 11 4.1 Seismic data 11 4.2 Environmental data 12 Real-time earthquake detection system 13 Computer systems 17 6.1 Computer resources 17 6.2 Waveform storage 17 6.3 Metadata 18 6.4 Software development 18 Fieldwork 18 Social media and outreach 19 8.1. Website 19 8.2. Twitter 20 8.3. Facebook (Page) 22 Publications and presentations 24 9.1. Publications 24 9.2. Public Presentations 25 9.3. Lunch Seminar Talks 25 References 26 Appendix A: Data availability for broadband stations from the AK network. 27 Appendix B: Gaps for broadband stations from the AK network. 3

Alaska Earthquake Center Quarterly Technical Report July-September 2021

This series of technical quarterly reports from the Alaska Earthquake Center (AEC) includes detailed summaries and updates on Alaska seismicity, the AEC seismic network and stations, field work, our social media presence, and lists publications and presentations by AEC staff. Multiple AEC staff members contributed to this report. It is issued in the following month after the completion of each quarter Q1: January-March, Q2: April-June, Q3: July-September, and Q4: October-December.1. Introduction 2. Seismicity 3. Field network 4. Data Quality assurance 5. Real-time earthquake detection system 6. Computer systems 6.1 Computer resources 6.2 Waveform storage 6.3 Metadata 6.4 Software development 7. Fieldwork 8. Social media and outreach 8.1. Website 8.2. Twitter 8.3. Facebook (Page) 8.4. Facebook (Group) 9. Publications and presentations 9.1. Publications 9.2. Public Presentations 9.3. Lunch Seminar Talks 10. References Appendix A: Data availability for broadband stations from the AK network. Appendix B: Gaps for broadband stations from the AK network

Alaska Earthquake Center Quarterly Technical Report January-March 2021

This is the first in a series of technical quarterly reports from the Alaska Earthquake Center (AEC). It includes detailed summaries and updates on Alaska seismicity, the AEC seismic network and stations, field work, our social media presence, and lists publications and presentations by AEC staff. Multiple AEC staff members contributed to this report. It is issued in the following month after the completion of each quarter Q1: January-March, Q2: April-June, Q3: July-September, and Q4: October-December.1. Introduction 2. Seismicity 3. Field network 4. Data Quality assurance 5. Real-time earthquake detection system 6. Computer systems 6.1 Computer resources 6.2 Waveform storage 6.3 Metadata 6.4 Software development 7. Fieldwork 8. Social media and outreach 8.1. Website 8.2. Twitter 8.3. Facebook (Page) 8.4. Facebook (Group): 9. Publications and presentations 9.1. Publications 9.2. Public Presentations 9.3. Brown Bag Talks 10. References Appendix A: Data availability for broadband stations from AK network. Appendix B: Gaps for broadband stations from AK network

Alaska Earthquake Center Quarterly Technical Report July-September 2022

This series of technical quarterly reports from the Alaska Earthquake Center (AEC) includes detailed summaries and updates on Alaska seismicity, the AEC seismic network and stations, field work, our social media presence, and lists publications and presentations by AEC staff. Multiple AEC staff members contribute to this report. It is issued in the following month after the completion of each quarter Q1: January-March, Q2: April-June, Q3: July-September, and Q4: October-December. The first report was published for January-March, 2021.1 Introduction 2 Seismicity 3 Field network 4 Data Quality assurance 4.1 Seismic data 4.2 Environmental data 5 Real-time earthquake detection system 6 Computer systems 6.1 Computer resources 6.2 Waveform storage 6.3 Metadata 6.4 Software development 7 Fieldwork 8 Social media and outreach 8.1. Website 8.2. Twitter 8.3. Facebook Page 8.4 K-12 and Community Outreach 9 Publications and presentations 9.1. Publications 9.2. Public Presentations 9.3. Lunch Seminar Talks 10 References Appendix A: Data availability for broadband stations from the AK network. Appendix B: Gaps for broadband stations from the AK network

Alaska Earthquake Center Quarterly Technical Report January-March 2023

This series of technical quarterly reports from the Alaska Earthquake Center (AEC) includes detailed summaries and updates on Alaska seismicity, the AEC seismic network and stations, field work, our social media presence, and lists publications and presentations by AEC staff. Multiple AEC staff members contribute to this report. It is issued in the following month after the completion of each quarter Q1: January-March, Q2: April-June, Q3: July-September, and Q4: October-December. The first report was published for January-March, 2021.1. Introduction 2. Seismicity 3. Field network 4. Data Quality assurance 4.1 Seismic data 4.2 Environmental data 5. Real-time earthquake detection system 6. Computer systems 6.1 Computer resources 6.2 Waveform storage 6.3 Metadata 6.4 Software development 7. Fieldwork 8. Social media and outreach 8.1 Website 8.2 Twitter 8.3 Facebook Page 9. Publications and presentations 9.1 Publications 9.2 Public Presentations 9.3 Lunch Seminar Talks 10. References Appendix A: Data availability for broadband stations from the AK network. Appendix B: Gaps for broadband stations from the AK network