M3.3 earthquake 1 km N of Portariá, Greece
A magnitude 3.3 earthquake struck 1 km N of Portariá, Greece on Fri, Feb 10, 1978, 11:48 PM GMT+2 (21:48 UTC), 33 km (21 mi) below the surface.
A larger quake followed: M3.4 5 km SE of Skiáthos, Greece. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 3.3 (ML, local (Richter)), minor
- Magnitude from
- USGS National Earthquake Information Center
- Local time
- UTC
- 1978-02-10 21:48:54 UTC
- Depth
- 33.0 km (20.5 mi), shallow
- Epicenter
- 39.399° N, 22.998° E
- Region
- Greece
- Tsunami flag
- No
- Status
- Reviewed by a seismologist
Did you feel it?
No one has reported feeling this quake to the USGS.
How well it is located
Reviewed by a seismologist.
- Depth from
- OPERATOR_ASSIGNED
- Stations used
- 7
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 1 in the 60 days after this one and 9 in the 30 days before it.
After
Before
- 3.43 km SSW of Káto Lekhónia, Greece · 17769 days ago · 33 km deep · 11 km away
- 2.915 km ESE of Zagorá, Greece · 17770 days ago · 33 km deep · 22 km away
- 3.014 km WNW of Evxinoúpolis, Greece · 17773 days ago · 33 km deep · 42 km away
- 3.04 km E of Áno Lekhónia, Greece · 17775 days ago · 33 km deep · 13 km away
- 4.56 km SSW of Volos, Greece · 17778 days ago · 38 km deep · 13 km away
- 3.31 km NNE of Agriá, Greece · 17780 days ago · 10 km deep · 6 km away
- 3.56 km WNW of Zagorá, Greece · 17781 days ago · 10 km deep · 9 km away
- 3.45 km ENE of Néa Anchiálos, Greece · 17782 days ago · 33 km deep · 15 km away
- 3.010 km WNW of Makrakómi, Greece · 17793 days ago · 33 km deep · 99 km away
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Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0000sx2. Read Sat, Oct 3, 2026, 6:46 PM UTC.