Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.1 on date 04-09-2020 and time 03:22:44 (Italy) in region 2 km W Sefro (MC)

A magnitude ML 1.1 earthquake occured in region: 2 km W Sefro (MC), on

  • 04-09-2020 01:22:44 (UTC)
  • 04-09-2020 03:22:44 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.1490, 12.9300 at 9 km depth.

The earthquake was located by: Sala Sismica INGV-Roma.

Search earthquakes: Any within 30 km radius

The values of hypocentral coordinates and magnitude may be revised at a later time as more information becomes available.

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Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Sefro MC 2 422 422
Fiuminata MC 5 1402 1824
Pioraco MC 6 1134 2958
Serravalle di Chienti MC 9 1070 4028
Camerino MC 11 6974 11002
Esanatoglia MC 12 2034 13036
Muccia MC 12 915 13951
Nocera Umbra PG 12 5839 19790
Castelraimondo MC 13 4587 24377
Matelica MC 14 9981 34358
Gualdo Tadino PG 15 15208 49566
Pieve Torina MC 15 1458 51024
Gagliole MC 15 620 51644
Pievebovigliana MC 16 866 52510
Valtopina PG 17 1398 53908
Fiordimonte MC 18 202 54110
Monte Cavallo MC 18 145 54255
Cerreto d'Esi AN 20 3817 58072

Municipalities with at least 50000 inhabitants

An earthquake occurred to
28 Km NE of Foligno (57155 inhabitants)
44 Km E of Perugia (166134 inhabitants)
69 Km NE of Terni (111501 inhabitants)
71 Km SW of Ancona (100861 inhabitants)
78 Km S of Fano (60888 inhabitants)
83 Km NW of Teramo (54892 inhabitants)
85 Km S of Pesaro (94582 inhabitants)
92 Km E of Arezzo (99543 inhabitants)
97 Km NW of L'Aquila (69753 inhabitants)
Recent and historical seismicity
Seismic hazard
Shakemap
Felt maps
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100 		ML 1.1 2020-09-04
01:22:44		 43.1487 12.9302 9 2020-09-04
01:53:02		 Sala Sismica INGV-Roma 82607401
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-09-04 01:22:44 ± 0.06
Latitude 43.1487 ± 0.0009
Longitude 12.9302 ± 0.0012
Depth (km) 9 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 82607401

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 140
Semi-minor axis of confidence ellipse (meter) 28
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 277
Circular confidence region, given by single value of horizontal uncertainty (meter) 140.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 99
Number of associated phases, regardless of their use for origin computation 24
Number of defining phases 11
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.07
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.22483
Number of stations at which the event was observed 18
Number of stations from which data was used for origin computation 6
Magnitude information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.2
Num. used stations 26
Type of magnitude ML
Reference to an origin 82607401
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-09-04 01:53:02
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.FIR.HHZ. 2020-09-04T01:23:10.39 3.0 undecidable manual P 1.11 0
IV.GAVE.EHZ. 2020-09-04T01:23:01.45 3.0 undecidable manual S -0.14 0
IV.MC2.EHZ. 2020-09-04T01:22:56.66 3.0 undecidable manual S 0.04 0
IV.NARO.HHZ. 2020-09-04T01:22:55.12 3.0 undecidable manual P -0.16 0
IV.EL6.EHZ. 2020-09-04T01:22:53.51 0.1 undecidable manual S 35 24.3534 110 0.01 99
IV.ATCC.EHZ. 2020-09-04T01:22:53.35 0.1 undecidable manual S 280 23.8539 110 0.03 98
IV.ATVO.HHZ. 2020-09-04T01:22:53.66 3.0 positive manual P -0.12 0
IV.MMO1.EHZ. 2020-09-04T01:22:52.51 3.0 negative manual P -0.25 0
IV.ARVD.HHZ. 2020-09-04T01:22:52.11 3.0 positive manual P 0.09 0
IV.FOSV.EHZ. 2020-09-04T01:22:52.11 3.0 undecidable manual S 0
IV.SSFR.HHZ. 2020-09-04T01:22:51.32 3.0 positive manual P 0.12 0
IV.FDMO.HHZ. 2020-09-04T01:22:51.40 0.1 undecidable manual S 134 17.7711 116 0.01 100
IV.GUMA.HHZ. 2020-09-04T01:22:51.50 3.0 positive manual P 0.1 0
IV.MURB.HHZ. 2020-09-04T01:22:51.49 3.0 undecidable manual P 0.13 0
IV.NRCA.HHZ. 2020-09-04T01:22:51.76 3.0 negative manual P -0.23 0
IV.CESI.HHZ. 2020-09-04T01:22:50.85 0.1 undecidable manual S 187 16.0728 118 -0.01 100
IV.ASSB.HHZ. 2020-09-04T01:22:49.67 0.1 positive manual P 242 24.9528 109 -0.14 96
IV.SNTG.HHZ. 2020-09-04T01:22:49.56 0.1 undecidable manual S 4 11.877 126 -0.05 100
IV.EL6.EHZ. 2020-09-04T01:22:49.68 0.1 positive manual P 35 24.3534 110 -0.02 98
IV.ATCC.EHZ. 2020-09-04T01:22:49.64 0.1 positive manual P 280 23.8539 110 0.04 98
IV.CESI.HHZ. 2020-09-04T01:22:48.26 0.1 positive manual P 187 16.0728 118 0.08 99
IV.FDMO.HHZ. 2020-09-04T01:22:48.46 0.1 undecidable manual P 134 17.7711 116 -0.03 99
IV.FOSV.EHZ. 2020-09-04T01:22:47.84 3.0 undecidable manual P 0
IV.SNTG.HHZ. 2020-09-04T01:22:47.53 0.1 negative manual P 4 11.877 126 0.07 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SNTG.HHE. ML:0.9 0.0001031 0.28 AML other m 2020-09-04T01:22:50.05
IV.SNTG.HHN. ML:1.0 0.0001235 0.44 AML other m 2020-09-04T01:22:50.68
IV.CESI.HHE. ML:0.9 0.0000799 0.24 AML other m 2020-09-04T01:22:51.15
IV.FDMO.HHN. ML:0.9 0.0000648 0.16 AML other m 2020-09-04T01:22:51.81
IV.FDMO.HHE. ML:0.8 0.000057050000000000004 0.18 AML other m 2020-09-04T01:22:51.98
IV.CESI.HHN. ML:0.8 0.0000645 0.32 AML other m 2020-09-04T01:22:52.53
IV.FOSV.EHN. ML:1.0 0.00007594999999999999 0.42 AML other m 2020-09-04T01:22:52.91
IV.FOSV.EHE. ML:0.8 0.00005020000000000001 0.84 AML other m 2020-09-04T01:22:52.54
IV.ATCC.EHE. ML:1.2 0.00010455000000000001 0.12 AML other m 2020-09-04T01:22:53.79
IV.EL6.EHN. ML:1.5 0.0001805 0.2 AML other m 2020-09-04T01:22:53.75
IV.EL6.EHE. ML:1.7 0.000282 0.28 AML other m 2020-09-04T01:22:53.85
IV.ATCC.EHN. ML:1.1 0.00007915 1.38 AML other m 2020-09-04T01:22:54.09
IV.ASSB.HHE. ML:0.9 0.000043349999999999997 0.3 AML other m 2020-09-04T01:22:55.00
IV.ASSB.HHN. ML:0.9 0.000045700000000000006 0.12 AML other m 2020-09-04T01:22:55.49
IV.GUMA.HHE. ML:1.6 0.0001525 0.3 AML other m 2020-09-04T01:22:57.24
IV.SSFR.HHE. ML:1.2 0.00005985 0.2 AML other m 2020-09-04T01:22:57.48
IV.MURB.HHE. ML:1.3 0.0000848 0.44 AML other m 2020-09-04T01:22:57.52
IV.NRCA.HHN. ML:1.3 0.0000726 0.46 AML other m 2020-09-04T01:22:57.65
IV.SSFR.HHN. ML:1.2 0.00006195 0.28 AML other m 2020-09-04T01:22:57.73
IV.NRCA.HHE. ML:1.4 0.0000886 0.16 AML other m 2020-09-04T01:22:57.72
IV.ARVD.HHE. ML:0.7 0.000020549999999999998 1.82 AML other m 2020-09-04T01:22:57.99
IV.MURB.HHN. ML:1.1 0.000050549999999999995 0.96 AML other m 2020-09-04T01:22:58.09
IV.GUMA.HHN. ML:1.4 0.00009915 1.3 AML other m 2020-09-04T01:22:58.76
IV.ARVD.HHN. ML:0.6 0.000014599999999999999 0.88 AML other m 2020-09-04T01:22:58.62
IV.GAVE.EHE. ML:1.2 0.00003965 0.16 AML other m 2020-09-04T01:23:01.76
IV.GAVE.EHN. ML:1.1 0.000032850000000000006 0.1 AML other m 2020-09-04T01:23:02.20
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download