Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.8 on date 22-09-2020 and time 04:43:40 (UTC) in region 5 km W Giano dell'Umbria (PG)

A magnitude ML 1.8 earthquake occured in region: 5 km W Giano dell'Umbria (PG), on

  • 22-09-2020 04:43:40 (UTC)
  • 22-09-2020 06:43:40 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.8330, 12.5150 at 7 km depth.

The earthquake was located by: Bollettino Sismico Italiano INGV.

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
Giano dell'Umbria PG 5 3846 3846
Massa Martana PG 6 3770 7616
Gualdo Cattaneo PG 9 6155 13771
Collazzone PG 9 3473 17244
Todi PG 10 16851 34095
Fratta Todina PG 12 1839 35934
Castel Ritaldi PG 13 3278 39212
Montefalco PG 13 5679 44891
Monte Castello di Vibio PG 13 1567 46458
Bevagna PG 14 5081 51539
Acquasparta TR 16 4778 56317
Marsciano PG 17 18902 75219
Deruta PG 18 9669 84888
Cannara PG 19 4305 89193
Trevi PG 20 8469 97662

Municipalities with at least 50000 inhabitants

An earthquake occurred to
21 Km SW of Foligno (57155 inhabitants)
32 Km NW of Terni (111501 inhabitants)
32 Km SE of Perugia (166134 inhabitants)
57 Km NE of Viterbo (67173 inhabitants)
87 Km SE of Arezzo (99543 inhabitants)
90 Km NW of L'Aquila (69753 inhabitants)
94 Km N of Guidonia Montecelio (88673 inhabitants)
99 Km W of Teramo (54892 inhabitants)
99 Km N of Tivoli (56533 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
Bulletin
Rev1000 		ML 1.8 2020-09-22
04:43:40		 42.8328 12.5153 7 2021-02-26
14:56:02		 Bollettino Sismico Italiano INGV 84415921
Reviewed
Rev100 		ML 1.9 2020-09-22
04:43:40		 42.8273 12.5087 8 2020-09-22
04:54:25		 Sala Sismica INGV-Roma 83120901
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-09-22 04:43:40 ± 0.05
Latitude 42.8328 ± 0.0027
Longitude 12.5153 ± 0.0037
Depth (km) 7 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 84415921

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 271
Semi-minor axis of confidence ellipse (meter) 232
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 205
Circular confidence region, given by single value of horizontal uncertainty (meter) 270.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 43
Number of associated phases, regardless of their use for origin computation 76
Number of defining phases 65
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.28
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.71766
Number of stations at which the event was observed 42
Number of stations from which data was used for origin computation 33
Magnitudes information

ML:1.9

Field Value
Value 1.9
Uncertainty 0.3
Num. used stations 52
Type of magnitude ML
Reference to an origin 83120901
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-09-22 04:54:25

ML:1.8

Field Value
Value 1.8
Uncertainty 0.2
Num. used stations 39
Type of magnitude ML
Reference to an origin 84415921
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-11-03 13:47:52
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CMPR.HHZ. 2020-09-22T04:45:27.67 3.0 undecidable manual Sg 15 0
MN.TRI.HHZ. 2020-09-22T04:45:07.77 3.0 undecidable manual Sg 8.47 0
IV.VENL.HNZ. 2020-09-22T04:44:55.67 3.0 undecidable manual Sg 7.78 0
IV.CMPR.HHZ. 2020-09-22T04:44:33.59 3.0 undecidable manual Pn 2.53 0
IV.MRB1.HHZ. 2020-09-22T04:44:30.07 3.0 negative manual Pg 9.59 0
MN.TRI.HHZ. 2020-09-22T04:44:27.31 3.0 negative manual Pn 3.76 0
IV.VAGA.HHZ. 2020-09-22T04:44:18.52 3.0 undecidable manual Pg 6.16 0
IV.FIR.HHZ. 2020-09-22T04:44:15.78 3.0 undecidable manual S -0.55 0
IV.CSNT.HHZ. 2020-09-22T04:44:13.30 3.0 undecidable manual S 2.72 0
IV.FIAM.HHZ. 2020-09-22T04:44:05.31 0.1 undecidable manual S 142 79.6647 50 0.25 87
IV.BADI.EHZ. 2020-09-22T04:44:04.69 0.1 undecidable manual S 344 78.2661 50 0.01 92
IV.CAFI.HHZ. 2020-09-22T04:44:03.02 0.1 undecidable manual S 321 70.7736 50 0.33 87
IV.SMA1.EHZ. 2020-09-22T04:44:03.36 0.1 undecidable manual S 108 70.4739 50 0.75 76
IV.GUMA.HHZ. 2020-09-22T04:44:03.31 0.1 undecidable manual S 69 71.2731 50 0.48 84
IV.EL6.EHZ. 2020-09-22T04:44:03.66 0.1 undecidable manual S 41 72.7716 50 0.45 84
IV.ATPI.EHZ. 2020-09-22T04:44:02.70 0.1 undecidable manual S 352 69.1752 50 0.44 85
IV.MMO1.EHZ. 2020-09-22T04:44:01.64 0.1 undecidable manual S 83 66.378 50 0.12 92
IV.CSP1.EHZ. 2020-09-22T04:44:01.07 0.1 undecidable manual S 63 62.8926 50 0.48 85
IV.RM33.EHZ. 2020-09-22T04:44:01.85 0.1 undecidable manual S 122 67.377 50 0.06 93
IV.LATE.HHN. 2020-09-22T04:44:00.96 0.3 undecidable manual S 247 62.8926 50 0.38 65
IV.ATMI.HHZ. 2020-09-22T04:44:00.05 0.1 undecidable manual S 340 59.0964 50 0.47 86
IV.ATVO.HHZ. 2020-09-22T04:43:59.96 0.1 undecidable manual S 352 61.5939 50 -0.27 90
IV.ATLO.EHE. 2020-09-22T04:43:58.11 0.1 undecidable manual S 351 54.2013 50 -0.16 93
IV.MC2.EHZ. 2020-09-22T04:43:58.91 0.1 undecidable manual S 81 55.5 50 0.31 90
IV.FDMO.HHZ. 2020-09-22T04:43:57.74 0.1 undecidable manual S 64 51.6039 50 0.15 94
IV.ATVA.EHE. 2020-09-22T04:43:57.66 0.1 undecidable manual S 339 52.8027 50 -0.25 92
IV.OFFI.HHZ. 2020-09-22T04:43:57.40 3.0 negative manual P 0.84 0
IV.LNSS.HHZ. 2020-09-22T04:43:56.70 0.1 undecidable manual S 121 49.8168 50 -0.39 89
IV.FEMA.HNE. 2020-09-22T04:43:56.08 0.3 undecidable manual S 72 45.7209 50 0.07 72
IV.NRCA.HHZ. 2020-09-22T04:43:56.58 0.1 undecidable manual S 90 48.7179 50 -0.22 93
IV.SACS.HHE. 2020-09-22T04:43:56.94 0.3 undecidable manual S 272 49.3173 50 -0.02 72
IV.MURB.HHZ. 2020-09-22T04:43:56.38 0.1 undecidable manual S 1 47.7189 50 -0.16 94
IV.ATCC.EHZ. 2020-09-22T04:43:54.27 0.1 undecidable manual S 14 40.3263 50 -0.3 93
IV.FIAM.HHZ. 2020-09-22T04:43:54.34 0.1 undecidable manual P 142 79.6647 50 -0.31 86
IV.BARO.HNZ. 2020-09-22T04:43:54.53 0.3 undecidable manual P 210 75.1692 50 0.57 61
IT.MTCL.HGZ. 2020-09-22T04:43:54.96 0.3 undecidable manual S 65 43.2234 50 -0.37 68
IV.BADI.EHZ. 2020-09-22T04:43:54.69 0.1 undecidable manual P 344 78.2661 50 0.26 87
IV.EL6.EHZ. 2020-09-22T04:43:53.80 0.1 undecidable manual P 41 72.7716 50 0.22 89
IV.CESI.HHZ. 2020-09-22T04:43:53.06 0.1 undecidable manual S 59 36.9297 101 -0.41 91
IV.CAFI.HHZ. 2020-09-22T04:43:53.11 0.1 undecidable manual P 321 70.7736 50 -0.17 90
IV.SMA1.EHZ. 2020-09-22T04:43:53.16 0.1 negative manual P 108 70.4739 50 -0.07 92
IV.GUMA.HHZ. 2020-09-22T04:43:53.64 0.1 positive manual P 69 71.2731 50 0.28 88
IV.SRES.HHZ. 2020-09-22T04:43:52.30 3.0 undecidable manual P -0.44 0
IV.LATE.HHN. 2020-09-22T04:43:52.76 0.3 undecidable manual P 247 62.8926 50 0.7 59
IV.ATPI.EHZ. 2020-09-22T04:43:52.97 0.1 undecidable manual P 352 69.1752 50 -0.06 92
IV.GAVE.EHZ. 2020-09-22T04:43:52.59 0.1 undecidable manual S 117 34.5432 101 -0.07 98
IV.MMO1.EHZ. 2020-09-22T04:43:52.33 0.1 undecidable manual P 83 66.378 50 -0.27 89
IV.MGAB.HHZ. 2020-09-22T04:43:52.34 0.1 undecidable manual S 285 33.9438 102 -0.11 97
IV.CSP1.EHZ. 2020-09-22T04:43:52.00 0.1 undecidable manual P 63 62.8926 50 -0.07 93
IV.RM33.EHZ. 2020-09-22T04:43:52.34 0.1 undecidable manual P 122 67.377 50 -0.42 86
IV.ARRO.EHZ. 2020-09-22T04:43:52.70 0.1 undecidable manual S 144 34.743 101 -0.02 99
IV.ATMI.HHZ. 2020-09-22T04:43:51.50 0.1 undecidable manual P 340 59.0964 50 0.02 95
IV.ATVO.HHZ. 2020-09-22T04:43:51.76 0.1 negative manual P 352 61.5939 50 -0.1 93
IV.MC2.EHZ. 2020-09-22T04:43:50.80 0.1 negative manual P 81 55.5 50 -0.12 94
IV.ATVA.EHE. 2020-09-22T04:43:50.15 0.1 undecidable manual P 339 52.8027 50 -0.37 89
IV.ASSB.HHZ. 2020-09-22T04:43:50.01 0.1 undecidable manual S 27 26.0517 105 0.24 96
IV.ATLO.EHE. 2020-09-22T04:43:50.62 0.1 positive manual P 351 54.2013 50 -0.11 94
IV.FDMO.HHZ. 2020-09-22T04:43:50.08 0.1 undecidable manual P 64 51.6039 50 -0.25 92
IV.NRCA.HHZ. 2020-09-22T04:43:49.54 0.1 negative manual P 90 48.7179 50 -0.34 90
IV.SACS.HHE. 2020-09-22T04:43:49.85 0.3 undecidable manual P 272 49.3173 50 -0.12 71
IV.MURB.HHZ. 2020-09-22T04:43:49.52 0.1 undecidable manual P 1 47.7189 50 -0.21 93
IV.LNSS.HHZ. 2020-09-22T04:43:49.63 0.1 positive manual P 121 49.8168 50 -0.42 89
IV.FEMA.HNE. 2020-09-22T04:43:49.40 0.3 undecidable manual P 72 45.7209 50 -0.02 73
IV.CESX.HHZ. 2020-09-22T04:43:49.46 0.1 undecidable manual S 167 25.5522 105 -0.15 98
IV.ATCC.EHZ. 2020-09-22T04:43:48.31 0.1 undecidable manual P 14 40.3263 50 -0.28 93
IT.MTCL.HGZ. 2020-09-22T04:43:48.77 0.3 undecidable manual P 65 43.2234 50 -0.26 70
IV.MGAB.HHZ. 2020-09-22T04:43:47.15 0.1 undecidable manual P 285 33.9438 102 -0.22 95
IV.ARRO.EHZ. 2020-09-22T04:43:47.26 0.1 negative manual P 144 34.743 101 -0.26 94
IV.CESI.HHZ. 2020-09-22T04:43:47.83 0.1 negative manual P 59 36.9297 101 -0.12 97
IV.GAVE.EHZ. 2020-09-22T04:43:47.10 0.1 undecidable manual P 117 34.5432 101 -0.39 92
IV.ASSB.HHZ. 2020-09-22T04:43:46.00 0.1 positive manual P 27 26.0517 105 0.18 97
IV.CESX.HHZ. 2020-09-22T04:43:45.64 0.1 positive manual P 167 25.5522 105 -0.09 99
IT.GNU.HGZ. 2020-09-22T04:43:43.72 0.1 undecidable manual S 126 5.4945 142 0.22 100
IV.MOMA.HNZ. 2020-09-22T04:43:43.75 0.1 undecidable manual S 126 5.4945 142 0.25 99
IV.MOMA.HNZ. 2020-09-22T04:43:42.64 0.1 positive manual P 126 5.4945 142 0.44 95
IT.GNU.HGZ. 2020-09-22T04:43:42.64 0.1 positive manual P 126 5.4945 142 0.44 95
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MOMA.HNE. ML:0.0 0.0052773310000000006 0.1024 AML other m 2020-09-22T04:43:44.00
IV.MOMA.HHE. ML:0.0 0.005912216499999999 0.1024 AML other m 2020-09-22T04:43:43.00
IV.MOMA.HNN. ML:0.0 0.0042795325000000006 0.0992 AML other m 2020-09-22T04:43:45.16
IV.MOMA.HHN. ML:0.0 0.004799246 0.0992 AML other m 2020-09-22T04:43:44.16
IV.CESX.HHN. ML:1.6 0.00023747164999999998 0.2816 AML other m 2020-09-22T04:43:49.81
IV.CESX.HHE. ML:1.5 0.0001867584 0.2816 AML other m 2020-09-22T04:43:49.76
IV.ASSB.HHN. ML:1.6 0.0002179564 0.24 AML other m 2020-09-22T04:43:50.31
IV.ASSB.HHE. ML:1.5 0.0001909923 0.1984 AML other m 2020-09-22T04:43:50.43
IV.GAVE.EHE. ML:2.2 0.0007670874 0.2016 AML other m 2020-09-22T04:43:53.19
IV.GAVE.HNE. ML:2.2 0.0007171828 0.1824 AML other m 2020-09-22T04:43:53.18
IV.GAVE.EHN. ML:2.1 0.0005220994 0.1376 AML other m 2020-09-22T04:43:53.22
IV.GAVE.HNN. ML:1.7 0.00022575 0.1696 AML other m 2020-09-22T04:43:53.20
IV.MGAB.HNE. ML:1.5 0.0001517551 0.5408 AML other m 2020-09-22T04:43:52.50
IV.MGAB.HHE. ML:1.6 0.00016645684999999998 0.4576 AML other m 2020-09-22T04:43:52.77
IV.ARRO.EHN. ML:1.6 0.00018277195 0.1568 AML other m 2020-09-22T04:43:53.07
IV.ARRO.EHE. ML:1.5 0.00013121577 0.7584 AML other m 2020-09-22T04:43:53.38
IV.CESI.HHN. ML:1.6 0.00017576675 0.16 AML other m 2020-09-22T04:43:53.79
IV.CESI.HHE. ML:1.6 0.0001433456 0.2208 AML other m 2020-09-22T04:43:53.63
IV.CESI.HNE. ML:1.6 0.000139979305 0.2112 AML other m 2020-09-22T04:43:53.63
IV.ATCC.EHN. ML:1.5 0.00012175425 0.4192 AML other m 2020-09-22T04:43:54.56
IV.ATCC.EHE. ML:1.6 0.000127715 0.3008 AML other m 2020-09-22T04:43:54.66
IV.MURB.HNN. ML:2.0 0.00027341245000000005 0.16 AML other m 2020-09-22T04:43:57.66
IV.MURB.HHN. ML:2.0 0.00026803025 0.3392 AML other m 2020-09-22T04:43:57.08
IV.MURB.HNE. ML:1.9 0.00020672570000000002 0.7584 AML other m 2020-09-22T04:43:56.79
IV.MURB.HHE. ML:1.8 0.00019049375 0.7808 AML other m 2020-09-22T04:43:56.79
IV.NRCA.HNN. ML:2.1 0.00031540124999999996 0.128 AML other m 2020-09-22T04:43:57.54
IV.NRCA.HNE. ML:1.7 0.00014015098 0.2592 AML other m 2020-09-22T04:43:56.85
IV.NRCA.HHN. ML:2.1 0.00033998609999999995 0.1184 AML other m 2020-09-22T04:43:57.53
IV.NRCA.HHE. ML:1.7 0.00015007804999999999 0.24 AML other m 2020-09-22T04:43:56.85
IV.LNSS.HHE. ML:1.8 0.00019157665 0.2816 AML other m 2020-09-22T04:43:56.89
IV.LNSS.HNE. ML:1.8 0.00017292720499999996 0.4576 AML other m 2020-09-22T04:43:57.26
IV.LNSS.HHN. ML:1.8 0.00014874595 0.6592 AML other m 2020-09-22T04:43:57.05
IV.FDMO.HHN. ML:1.6 0.000096543375 0.2016 AML other m 2020-09-22T04:43:58.20
IV.FDMO.HHE. ML:1.6 0.00009134936 0.2592 AML other m 2020-09-22T04:43:58.00
IV.CSP1.EHE. ML:1.8 0.00011391713000000001 0.6976 AML other m 2020-09-22T04:44:01.70
IV.CSP1.EHN. ML:1.8 0.000135222685 0.7616 AML other m 2020-09-22T04:44:01.71
IV.RM33.EHE. ML:1.5 0.000054534869999999996 0.7616 AML other m 2020-09-22T04:44:02.89
IV.RM33.EHN. ML:1.4 0.000042518399999999996 0.1408 AML other m 2020-09-22T04:44:02.47
IV.CAFI.HNN. ML:1.9 0.00012358555 0.6016 AML other m 2020-09-22T04:44:15.40
IV.SMA1.EHE. ML:2.4 0.00039492724999999997 0.2976 AML other m 2020-09-22T04:44:04.63
IV.SMA1.EHN. ML:2.2 0.0002431565 0.3008 AML other m 2020-09-22T04:44:04.56
IV.GUMA.HHN. ML:2.1 0.00019600584999999998 0.2592 AML other m 2020-09-22T04:44:04.33
IV.GUMA.HHE. ML:2.2 0.00023288385 0.3232 AML other m 2020-09-22T04:44:04.25
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