SOFIA · BULGARIA · SEISMIC RISK INTELLIGENCE

Seismic Risk in Sofia
Before You Sign.

Sofia sits in seismic Zone 7 (ag=0.20g) per Eurocode 8 Bulgarian National Annex. The Sofia basin amplifies seismic waves significantly. Pre-1978 buildings lack modern seismic design entirely.

⚡ HIGH · Zone 7 · 0.20g
Zone 7
EC8 BG NA seismic zone
0.20g
Peak ground acceleration
2012
Year of M5.8 Sofia earthquake

Sofia Seismic Zone

Zone 7
HIGH
BG NA:2012 + EN 1998-1
LIVE
PGA0.20g
ZoneZone 7
StandardBG NA:2012 + EN 1998-1
Key riskSofia graben fault · basin amplification · pre-1978 panelki
Legal frameworkZMUST + EC8 BG NA:2012
Historical events1858 M6.2 Sofia · 1917 M6.5 · 2012 M5.8 Sofia

Recent Seismic Activity LIVE

Loading live seismic data…
Full AI Report · Free to start
Check any address in Sofia

Full 8-page AI Smart Report: seismic zone · flood risk · solar intel · Master Grade A–F · PDF
2 free checks/day · No signup required

Analyze Sofia Property → See Sample Report

FAQ — Seismic Risk in Sofia

Sofia is in Zone 7 per BG NA:2012 (Eurocode 8), with design PGA 0.20g. The city sits in the Sofia basin — a graben structure with soft alluvial sediments that amplify seismic waves 2–3x compared to bedrock.
The central Sofia basin (Lozenets, Mladost panel blocks, Lulin) sits on soft alluvial soils. Vitosha Mountain slopes (Dragalevtsi, Simeonovo) have stiffer materials with lower amplification.
Panelki are prefabricated concrete panel buildings from 1960–1985. They have poor seismic connections, aging reinforcement, and were not designed to Eurocode 8. Banks increasingly require structural assessments for pre-1985 panelki.
Use AGKK (kais.agk.bg) for cadastral data. Check Imotni registri (Property Registry) for ownership. Verify if the building has a Технически Паспорт (Technical Passport) — mandatory since 2009 for existing buildings.

Other Cities

IstanbulBucharestLisbonZagrebTel Aviv + Any address →