Ioanian Islands, Greece – Earthquakes

This page summarizes earthquakes in Ioanian Islands (Greece). The most recently recorded event was a magnitude M1.9 earthquake near Sami Municipal Unit on 2026-10-21 05:37:06 UTC. All event lists and map markers are limited to the last 30 days.

Seismic profile â†“

Earthquakes (last 30 days)

107

Max magnitude (last 30 days)

M4.7

Avg magnitude (last 30 days)

M1.89

Avg depth (last 30 days)

11 km

Seismic profile

Analysis period05 Oct 2025 – 05 Oct 2026Data as of: 05 Oct 2026 · 16:00 UTC

Minimum magnitude

The last update is over two hours old. The figures reflect the data timestamp shown below.

What the data show

Ioanian Islands · M ≥ 2.0

After source reconciliation, the catalogue contains 101 event entries of M2.0 or above for this area and period, spread over 57 days.

Catalogue entries10105 Oct 2025 – 05 Oct 2026

Strongest recorded earthquakeM4.8Kefallonia Regional Unit ↗

Depth · median8.7 km101 events with valid depth

Last 30 days41Previous 30 days: 20

These figures describe the stored catalogue. Recording, magnitude types and geographic attribution may vary by source and period; completeness has not been established.

05 Oct 2025 – 05 Oct 2026

Earthquakes by month

M ≥ 2.0

Each bar counts events within the selected period. Hatched months are only partially included.

Oct2025

Nov2025

Dec2025

Jan2026

Feb2026

Mar2026

Apr2026

May2026

Jun2026

Jul2026

Aug2026

Sep2026

Oct2026

View data table

Month	Analysis period	Catalogue entries
October 2025 · Partial month	05 Oct 2025 – 31 Oct 2025	0
November 2025	01 Nov 2025 – 30 Nov 2025	0
December 2025	01 Dec 2025 – 31 Dec 2025	0
January 2026	01 Jan 2026 – 31 Jan 2026	0
February 2026	01 Feb 2026 – 28 Feb 2026	0
March 2026	01 Mar 2026 – 31 Mar 2026	1
April 2026	01 Apr 2026 – 30 Apr 2026	1
May 2026	01 May 2026 – 31 May 2026	1
June 2026	01 Jun 2026 – 30 Jun 2026	12
July 2026	01 Jul 2026 – 31 Jul 2026	20
August 2026	01 Aug 2026 – 31 Aug 2026	20
September 2026	01 Sep 2026 – 30 Sep 2026	44
October 2026 · Partial month	01 Oct 2026 – 05 Oct 2026	2

How strong were the earthquakes?

Catalogue entries · 101

M 2.0 – < 3.091

M 3.0 – < 4.08

M 4.0 – < 5.02

M 5.0 – < 6.00

M ≥ 6.00

At what depth did they occur?

101 events with valid depth

0 – < 30 km94

30 – < 70 km4

70 – < 300 km3

300 – 750 km0

0 events without valid depth are excluded here.

Depth · median

Half of the available values lie on either side of the median; ties are possible.

Current period in context

Last 30 days41

Previous 30 days20

Median of the eleven previous 30-day periods1

Same magnitude threshold, separate periods. Differences may also reflect changes in recording. No hazard level or forecast is inferred.

Where were earthquakes recorded?

Events assigned to Ioanian Islands in the stored location data are analysed. This is not a radius search. Missing or different attributions are excluded.

The interactive map complements the event links on this page.

Marker size and colour indicate magnitude.

Strongest recorded earthquake

05 Oct 2025 – 05 Oct 2026 · M ≥ 2.0

M4.8

Kefallonia Regional Unit

12 Sep 2026 · 17:51 UTC

Depth: 34.0 km · USGS

View event ↗

M4.4

Lefki

29 Mar 2026 · 03:02 UTC

Depth: 88.0 km · SERBIA_RSZ

View event ↗

M3.9

Seismic profile

Ioanian Islands · M ≥ 2.0

Earthquakes by month

How strong were the earthquakes?

At what depth did they occur?

Current period in context

Where were earthquakes recorded?

Strongest recorded earthquake

Kefallonia Regional Unit

Lefki

Zakynthos Regional Unit

Data and methodology

Source reports used

Map (last 30 days)

Seismic activity in 2026

Earthquakes in Ioanian Islands (last 30 days)