M 4.3 - TYRRHENIAN SEA - 2017-08-21 18:57:52 UTC

I felt this earthquake


	Summary	Maps	Testimonies	Pictures	List of data providers	Scientific data

You felt this earthquake. Tell us!

Magnitude	mb 4.3
Region	TYRRHENIAN SEA
Date time	2017-08-21 18:57:52.5 UTC
Location	40.78 N ; 13.87 E
Depth	10 km
Distances	170 km SE of Roma, Italy / pop: 2,564,000 / local time: 20:57:52.5 2017-08-21 33 km W of Napoli, Italy / pop: 989,000 / local time: 20:57:52.5 2017-08-21 9 km NW of Ischia Porto, Italy / pop: 18,200 / local time: 20:57:52.5 2017-08-21

Source parameters reviewed by a seismologist

More information at:

Italian National Seismic Network Roma, Italy

Earthquake View	Interactive Maps View	I felt this earthquake	Contribution Map

Seismicity	Regional Moment tensors	Quick MT solutions	PGA/PGV/Population

Int_Dist	Dist_Time	Donut

No enough data for Intensity/Distance curve

For more information on computation, see the article Bossu et al., 2016:

Thumbnail Based Questionnaires for the Rapid and Efficient Collection of Macroseismic Data from Global Earthquakes, Rémy Bossu, Matthieu Landès, Fréderic Roussel, Robert Steed, Gilles Mazet-Roux, Stacey S. Martin, and Susan Hough. Seismological Research Letter. Oct 2016. doi: 10.1785/0220160120;
Furthermore, to avoid the association with wrong events, we filter testimonies in distance and in intensity depending on the magnitude of the seismic event.


Global view	Regional view	Local view

References for tectonic plate boundaries:
Coffin, M.F., Gahagan, L.M., and Lawver, L.A., 1998, Present-day Plate Boundary Digital Data Compilation. University of Texas Institute for Geophysics Technical Report No. 174, pp. 5.

Maps view: Seismicity from the previous 7 days in the area

Regional instrumental seismicity

This seismicity maps have been generated by concatenating the ISC catalogue (since 1964), the EMSC Euro-Med Bulletin catalogue and the EMSC Real Time catalogue. Therefore, they show the seismicity from 1964 until the earthquake occurrence.

Regional deadly earthquakes from 1500 to origin time

Date

Long.

Lat.

Mag.

Death

Location

1456-12-05	14.7	41.3	7.1	30000	SOUTHERN ITALY
1461-11-27	13.6	42.3	6.3	100	CENTRAL ITALY
1561-07-31	15.4	40.6	6.0	100	SOUTHERN ITALY
1561-08-19	15.5	40.5	6.5	500	SOUTHERN ITALY
1627-07-30	15.4	41.7	6.8	5000	SOUTHERN ITALY
1638-03-27	16.3	39.1	6.9	30000	SOUTHERN ITALY
1639-10-08	13.3	42.6	5.5	500	CENTRAL ITALY
1654-07-23	13.7	41.6	6.1	200	SOUTHERN ITALY
1688-06-05	14.6	41.3	6.6	10000	SOUTHERN ITALY
1694-09-08	15.4	40.9	6.8	4820	SOUTHERN ITALY
1695-06-11	12.1	42.6	6.1	50	CENTRAL ITALY
1702-03-14	15.0	41.1	6.3	40	SOUTHERN ITALY
1703-01-14	13.1	42.7	6.7	9761	CENTRAL ITALY
1703-02-02	13.3	42.4	6.7	many	CENTRAL ITALY
1706-11-03	14.1	42.1	6.7	2400	CENTRAL ITALY
1730-05-12	13.1	42.8	6.0	500	CENTRAL ITALY
1731-03-20	15.8	41.3	6.6	500	SOUTHERN ITALY
1732-03-27	14.8	40.9	?	2000	SOUTHERN ITALY
1732-11-29	15.1	41.1	6.6	1942	SOUTHERN ITALY
1767-07-14	16.3	39.4	5.6	many	SOUTHERN ITALY
1799-07-28	13.2	43.2	5.8	104	CENTRAL ITALY
1805-07-26	14.5	41.5	6.6	5573	SOUTHERN ITALY
1819-05-26	11.8	42.5	?	many	CENTRAL ITALY
1828-02-02	13.8	40.8	4.5	29	TYRRHENIAN SEA
1835-10-12	16.3	39.3	5.9	115	SOUTHERN ITALY
1836-04-25	16.7	39.6	6.3	239	SOUTHERN ITALY
1851-08-14	15.7	41.0	6.3	1000	SOUTHERN ITALY
1854-02-12	16.3	39.3	6.1	472	SOUTHERN ITALY
1857-12-16	15.9	40.4	7.0	10939	SOUTHERN ITALY
1859-08-22	13.1	42.8	5.7	101	CENTRAL ITALY
1870-10-04	16.3	39.2	6.1	117	SOUTHERN ITALY
1881-03-04	13.9	40.7	?	126	TYRRHENIAN SEA
1881-03-16	13.9	40.7	?	114	TYRRHENIAN SEA
1883-07-28	13.9	40.8	5.6	2333	TYRRHENIAN SEA
1905-09-08	16.1	38.7	6.8	557	SOUTHERN ITALY
1910-06-07	15.4	40.9	5.8	50	SOUTHERN ITALY
1915-01-13	13.7	42.0	7.0	32610	CENTRAL ITALY
1930-07-23	15.4	41.1	6.7	1404	SOUTHERN ITALY
1943-10-03	13.7	42.9	5.9	25	CENTRAL ITALY
1980-11-23	15.3	40.9	6.7	2483	SOUTHERN ITALY
2002-09-06	13.7	38.3	5.9	2	SICILY, ITALY
2002-10-31	14.9	41.7	5.7	29	SOUTHERN ITALY
2009-04-06	13.3	42.4	6.3	309	CENTRAL ITALY
2009-04-07	13.4	42.3	5.6	1	CENTRAL ITALY
2016-08-24	13.2	42.7	6.2	299	CENTRAL ITALY
2016-10-26	13.1	42.9	6.1	1	CENTRAL ITALY
2016-10-30	13.1	42.8	6.5	2	CENTRAL ITALY
2017-01-18	13.3	42.5	5.7	34	CENTRAL ITALY
2017-08-21	13.9	40.8	4.3	2	TYRRHENIAN SEA

Source:

From 1500 to 1999: T. Utsu ; International Handbook of Earthquake and Engineering Seismology; vol. A; 691-718
From 2000 to 2007: USGS Quality composite earthquake catalog
From 2008: National Centers for Environmental Information (NOAA)

MapGraphsClustering

Map created with the testimonies provided by the eyewitnesses (click to enlarge).

Download as KML