2020

• November: APSI contribution #12 online. Topic: Usage of impact structures etc. unconformities to determine erosion and burial history of Southern Finland, in Precambrian Res.
• September: APSI welcomes its 15th member. APSI’s central point loops just north of the Ritland crater and ends up in southern Hardangervidda, the largest mountain plateau in Europe.
• August: APSI takes part in developing “The Arctic Time Trek“, a new science trekking trail in Utsjoki, Finland. Later, also the similar but shorter Ruissalo Time Trek route in the botanical garden of Turku, Finland, is opened.
• July: APSI contribution #11 online. Topic: Muography in bedrock research, in Rock Mech. Rock Eng.
• June: New peer-reviewed article online. Topic: Recent volcano-tectonic events on Venus, in Earth Planet. Sci. Lett.
• April: APSI contribution #10 online. Topic: Underground background radiation, in Nucl. Instrum. Meth. A
• January: APSI members contribute to the dictionary Tieteen Termipankki (“Helsinki term bank for the arts and sciences”)

2019

• October: 14th member accepted. APSI central point shifts toward the coast of Norway.
• June: APSI contributes to the Summanen crater exhibition at the Kivikauden kylä museum in Saarijärvi, Finland.

2018

• September: The APSI central point shifts to near the Siljan impact crater in Sweden.
• April: 2nd PhD defence in APSI history: “Small impact craters in crater counting – Evolution studies of the eastern Hellas outflow channels, Mars“. The dissertation is available here.
• April: APSI contribution #9 online. Topic: Volcanic features within fluvial channels on Mars, in Geophys. Res. Lett.
• February: 13th member accepted, representing 4th nationality within APSI.
• January: Project on a Finnish dictionary of planetary geology kickstarted.
• January: APSI contribution #8 online. Topic: Relative age determination with small craters, in Icarus.

2017

• December: APSI contribution #7 online. Topic: Outflow channel evolution on Mars, in Planet. Space Sci.
• November: 40th expert interview by an APSI member given to media.
• September: 11th member accepted. APSI is now multinational and spans over three countries. The central point resides now north of the Lappajärvi impact crater.
• April: 25th APSI affiliated public lecture presented in Rovaniemi.
• March: 1st honorary member invited.
• March: 1st PhD defence in APSI history: “Visible and near infrared spectroscopy of Mercury and Venus from orbit“. The dissertation is available here.

2016

• The APSI central point wanders near the Lappajärvi impact crater in Ostrobothnia (Finland).
• December: New logo released.
• December: Web pages published.
• October: 100th APSI affiliated public science article published.
• September: 10th APSI conference abstract.
• June: Project on NASA Nordic Regional Planetary Image Facility archive relocation ends. APSI transfers the materials in the to Järviseutu-Seura ry. The unique planetary images are to be used as foundation of a new science exhibition around the impact crater lake Lappajärvi.
• March: APSI contribution #6 published. Topic: The two Suvasvesi impact structures’ ages, in Meteorit. Planet. Sci.
• February: APSI contribution #5 published. Topic: The Keurusselkä impact structure age, in Meteorit. Planet. Sci.

2015

• December: APSI officially registered in the Finnish Register of Associations. Apsi central point resides firmly near the University of Oulu (Finland).
• November: APSI officially founded with 6 founding members.
• October: APSI contribution #4 published. Topic: The basalts of Mare Frigoris in J. Geophys. Res. Planets.
• June: APSI project on the Finnish impact crater book started.
• APSI members contribute to the Encyclopedia of Planetary Landforms as writers and editors.

2014

• December: APSI contribution #3 published. Topic: The Paasselkä impact structure age, in Meteorit. Planet. Sci.
• June: APSI contribution #2 published. Topic: The Kepler crater depostis on the Moon, in J. Geophys. Res. Planets.
• February: APSI contribution #1 published. Topic: The volcano Alba Mons on Mars, in Icarus.

2013

• November: APSI headquarters moves to Rovaniemi.
• October: Project to relocate and/or otherwise save the invaluable materials in the NASA NRPIF (Nordic Regional Planetary Image Facility) archive started; project ends in mid-2016.
• Early autumn: APSI (unregistered) founded.