Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.9 on date 27-07-2020 and time 12:09:12 (UTC) in region 2 km SW Massa Martana (PG)

A magnitude ML 1.9 earthquake occured in region: 2 km SW Massa Martana (PG), on

  • 27-07-2020 12:09:12 (UTC)
  • 27-07-2020 14:09:12 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.7660, 12.5120 at 8 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
Massa Martana PG 2 3770 3770
Acquasparta TR 9 4778 8548
Todi PG 9 16851 25399
Giano dell'Umbria PG 9 3846 29245
Montecastrilli TR 13 5022 34267
Avigliano Umbro TR 14 2558 36825
Castel Ritaldi PG 15 3278 40103
Monte Castello di Vibio PG 16 1567 41670
Collazzone PG 16 3473 45143
Fratta Todina PG 16 1839 46982
Gualdo Cattaneo PG 17 6155 53137
San Gemini TR 17 5018 58155
Montefalco PG 18 5679 63834
Spoleto PG 19 38218 102052

Municipalities with at least 50000 inhabitants

An earthquake occurred to
25 Km NW of Terni (111501 inhabitants)
26 Km SW of Foligno (57155 inhabitants)
39 Km S of Perugia (166134 inhabitants)
51 Km NE of Viterbo (67173 inhabitants)
86 Km NW of L'Aquila (69753 inhabitants)
87 Km N of Guidonia Montecelio (88673 inhabitants)
92 Km N of Tivoli (56533 inhabitants)
93 Km SE of Arezzo (99543 inhabitants)
95 Km NE of Civitavecchia (52991 inhabitants)
97 Km N of Roma (2864731 inhabitants)
98 Km W of Teramo (54892 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 1.9 2020-07-27
12:09:12		 42.7657 12.5125 8 2020-11-19
12:36:56		 Bollettino Sismico Italiano INGV 81675821
Reviewed
Rev100 		ML 1.9 2020-07-27
12:09:12		 42.764 12.5263 7 2020-07-27
12:20:43		 Sala Sismica INGV-Roma 81399811
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-07-27 12:09:12 ± 0.07
Latitude 42.7657 ± 0.0036
Longitude 12.5125 ± 0.0049
Depth (km) 8 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 81675821

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 427
Semi-minor axis of confidence ellipse (meter) 319
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 213
Circular confidence region, given by single value of horizontal uncertainty (meter) 430.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 93
Number of associated phases, regardless of their use for origin computation 50
Number of defining phases 39
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.27
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.72845
Number of stations at which the event was observed 34
Number of stations from which data was used for origin computation 23
Magnitudes information

ML:1.9

Field Value
Value 1.9
Uncertainty 0.3
Num. used stations 36
Type of magnitude ML
Reference to an origin 81675821
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-08-05 14:05:59

ML:1.9

Field Value
Value 1.9
Uncertainty 0.3
Num. used stations 36
Type of magnitude ML
Reference to an origin 81399811
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-07-27 12:20:43
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
GU.CIRO.HHZ. 2020-07-27T12:11:18.70 3.0 undecidable manual Sn 3.27 0
CR.STON.BHZ. 2020-07-27T12:11:00.70 3.0 undecidable manual Sn 3.53 0
IV.FREG.EHZ. 2020-07-27T12:10:55.20 3.0 undecidable manual Sg 11.81 0
MN.CLTB.HHZ. 2020-07-27T12:10:31.51 3.0 undecidable manual Pn 1.02 0
GU.RSP.HHZ. 2020-07-27T12:10:22.74 3.0 undecidable manual Pn 2.24 0
IV.SALB.HHZ. 2020-07-27T12:10:17.58 3.0 undecidable manual Pn 2.66 0
IV.CAPR.HNZ. 2020-07-27T12:10:16.95 3.0 undecidable manual Pg 11.05 0
IV.VENT.EHZ. 2020-07-27T12:10:12.15 3.0 undecidable manual Sn -2.89 0
OT.OT13.EHZ. 2020-07-27T12:09:57.69 3.0 positive manual Pn -0.39 0
IV.PTRJ.HHZ. 2020-07-27T12:09:50.23 3.0 undecidable manual Pg 3.17 0
IV.CSP1.EHZ. 2020-07-27T12:09:33.81 0.3 undecidable manual S 57 66.8775 50 0.25 64
IV.RM33.EHZ. 2020-07-27T12:09:32.95 0.6 undecidable manual S 116 63.9915 50 0.17 44
IV.MC2.EHZ. 2020-07-27T12:09:31.84 0.6 undecidable manual S 73 57.3981 50 0.82 36
IV.FDMO.HHZ. 2020-07-27T12:09:31.06 0.3 undecidable manual S 57 55.5 50 0.52 62
IV.MURB.HHZ. 2020-07-27T12:09:30.72 0.1 undecidable manual S 1 55.2003 50 0.28 87
IV.NRCA.HHZ. 2020-07-27T12:09:29.12 0.1 undecidable manual S 81 49.5171 50 0.18 90
IV.SACS.HHZ. 2020-07-27T12:09:28.86 0.3 undecidable manual S 281 49.9167 50 -0.17 68
IV.ATCC.EHZ. 2020-07-27T12:09:28.03 0.3 undecidable manual S 12 47.7189 50 -0.4 65
IV.LNSS.HHZ. 2020-07-27T12:09:28.21 0.1 undecidable manual S 113 46.7199 50 0.04 93
IV.MF5.EHZ. 2020-07-27T12:09:27.35 0.1 undecidable manual P 72 80.8635 50 0.52 79
IV.EL6.EHZ. 2020-07-27T12:09:27.48 0.6 undecidable manual P 37 78.6657 50 0.99 32
IV.CAMP.HHZ. 2020-07-27T12:09:26.06 0.1 undecidable manual P 109 77.4669 50 -0.25 84
IV.CESI.HHZ. 2020-07-27T12:09:26.81 0.1 undecidable manual S 50 41.5251 50 0.03 94
IV.FIAM.HHZ. 2020-07-27T12:09:25.70 0.3 undecidable manual P 138 74.0703 50 -0.09 66
IV.MGAB.HHZ. 2020-07-27T12:09:25.28 0.3 undecidable manual S 297 36.4413 50 -0.15 70
IV.GUMA.HHZ. 2020-07-27T12:09:25.79 0.3 undecidable manual P 63 74.5698 50 -0.06 66
IV.SRES.HHE. 2020-07-27T12:09:24.00 3.0 undecidable manual P 0.24 0
IV.CSP1.EHZ. 2020-07-27T12:09:24.46 0.3 undecidable manual P 57 66.8775 50 -0.21 65
IV.SMA1.EHZ. 2020-07-27T12:09:24.84 0.3 undecidable manual P 102 68.7756 50 -0.12 66
IV.LATE.HHE. 2020-07-27T12:09:24.51 0.3 undecidable manual P 254 60.1953 50 0.87 53
IV.GAVE.EHZ. 2020-07-27T12:09:23.85 0.1 undecidable manual S 105 32.1456 104 -0.17 93
IV.MC2.EHZ. 2020-07-27T12:09:23.05 0.3 undecidable manual P 73 57.3981 50 -0.16 67
IV.RM33.EHZ. 2020-07-27T12:09:23.97 0.3 undecidable manual P 116 63.9915 50 -0.26 65
IV.FDMO.HHZ. 2020-07-27T12:09:22.54 0.3 undecidable manual P 57 55.5 50 -0.39 64
IV.MURB.HHZ. 2020-07-27T12:09:22.65 0.1 undecidable manual P 1 55.2003 50 -0.22 88
IV.SACS.HHZ. 2020-07-27T12:09:22.17 0.1 undecidable manual P 281 49.9167 50 0.11 91
IV.ARRO.EHZ. 2020-07-27T12:09:22.72 0.1 undecidable manual S 135 29.2485 105 -0.32 91
IV.LNSS.HHZ. 2020-07-27T12:09:21.29 0.1 undecidable manual P 113 46.7199 50 -0.27 89
IV.NRCA.HHZ. 2020-07-27T12:09:21.75 0.1 positive manual P 81 49.5171 50 -0.25 89
IV.ATCC.EHZ. 2020-07-27T12:09:21.36 0.1 undecidable manual P 12 47.7189 50 -0.36 87
IV.CESI.HHZ. 2020-07-27T12:09:20.56 0.1 undecidable manual P 50 41.5251 50 -0.2 91
IV.CESX.HHZ. 2020-07-27T12:09:19.68 0.1 undecidable manual S 161 18.4704 113 0.19 95
IV.MGAB.HHZ. 2020-07-27T12:09:19.80 0.1 undecidable manual P 297 36.4413 50 -0.18 92
IV.ARRO.EHZ. 2020-07-27T12:09:18.73 0.1 undecidable manual P 135 29.2485 105 0.13 94
IV.GAVE.EHZ. 2020-07-27T12:09:18.90 0.1 undecidable manual P 105 32.1456 104 -0.27 91
IV.MOMA.HNZ. 2020-07-27T12:09:16.00 0.1 undecidable manual S 48 6.2937 141 -0.03 100
IV.CESX.HHZ. 2020-07-27T12:09:16.87 0.1 undecidable manual P 161 18.4704 113 0.32 92
IT.GNU.HGZ. 2020-07-27T12:09:15.99 0.1 undecidable manual S 48 6.2937 141 -0.05 100
IT.GNU.HGZ. 2020-07-27T12:09:14.81 0.1 undecidable manual P 48 6.2937 141 0.25 96
IV.MOMA.HNZ. 2020-07-27T12:09:14.75 0.1 undecidable manual P 48 6.2937 141 0.19 97
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CESX.HHN. ML:1.8 0.000623 0.28 AML other m 2020-07-27T12:09:22.18
IV.CESX.HHE. ML:1.8 0.000499 1.24 AML other m 2020-07-27T12:09:22.27
IV.ARRO.EHE. ML:1.9 0.00038749999999999993 0.28 AML other m 2020-07-27T12:09:24.70
IV.ARRO.EHN. ML:1.8 0.0003595 0.18 AML other m 2020-07-27T12:09:24.92
IV.GAVE.EHE. ML:1.8 0.00030649999999999997 1.04 AML other m 2020-07-27T12:09:25.20
IV.MGAB.HHN. ML:2.1 0.000456 0.92 AML other m 2020-07-27T12:09:25.96
IV.MGAB.HNN. ML:2.0 0.0004365 0.92 AML other m 2020-07-27T12:09:25.97
IV.MGAB.HNE. ML:2.1 0.0005340000000000001 0.48 AML other m 2020-07-27T12:09:26.29
IV.MGAB.HHE. ML:2.2 0.0005785 0.6 AML other m 2020-07-27T12:09:26.28
IV.GAVE.EHN. ML:1.9 0.000329 0.9 AML other m 2020-07-27T12:09:26.69
IV.CESI.HHN. ML:1.8 0.0002245 1.34 AML other m 2020-07-27T12:09:27.11
IV.CESI.HHE. ML:1.6 0.000124 1.52 AML other m 2020-07-27T12:09:29.12
IV.LNSS.HHE. ML:2.0 0.000284 0.34 AML other m 2020-07-27T12:09:29.35
IV.ATCC.EHE. ML:1.7 0.0001385 1.08 AML other m 2020-07-27T12:09:29.12
IV.ATCC.EHN. ML:1.8 0.000158 0.38 AML other m 2020-07-27T12:09:30.32
IV.LNSS.HHN. ML:1.9 0.000248 0.48 AML other m 2020-07-27T12:09:30.15
IV.NRCA.HHN. ML:2.0 0.000256 0.38 AML other m 2020-07-27T12:09:30.95
IV.NRCA.HHE. ML:1.9 0.000202 0.36 AML other m 2020-07-27T12:09:31.29
IV.FDMO.HHN. ML:1.7 0.00011949999999999999 0.92 AML other m 2020-07-27T12:09:31.65
IV.FDMO.HHE. ML:1.8 0.0001365 0.2 AML other m 2020-07-27T12:09:31.65
IV.MURB.HHE. ML:2.2 0.000363 0.28 AML other m 2020-07-27T12:09:32.45
IV.MURB.HHN. ML:2.3 0.0004285 1.58 AML other m 2020-07-27T12:09:33.92
IV.RM33.EHN. ML:1.8 0.0001114 0.58 AML other m 2020-07-27T12:09:34.71
IV.SMA1.EHE. ML:2.3 0.0003675 0.3 AML other m 2020-07-27T12:09:36.27
IV.GUMA.HNN. ML:3.0 0.0015065000000000002 0.82 AML other m 2020-07-27T12:09:36.78
IV.FIAM.HHE. ML:1.4 0.0000333 0.34 AML other m 2020-07-27T12:09:37.59
IV.CSP1.EHN. ML:1.9 0.00014700000000000002 1.22 AML other m 2020-07-27T12:09:39.25
IV.CSP1.EHE. ML:1.8 0.0001068 0.52 AML other m 2020-07-27T12:09:40.36
IV.FIAM.HHN. ML:1.4 0.0000375 0.78 AML other m 2020-07-27T12:09:40.31
IV.RM33.EHE. ML:1.8 0.00013450000000000002 1.26 AML other m 2020-07-27T12:09:41.21
IV.SMA1.EHN. ML:2.0 0.000189 0.56 AML other m 2020-07-27T12:09:42.08
IV.GUMA.HHN. ML:2.1 0.00017449999999999999 1.56 AML other m 2020-07-27T12:09:43.87
IV.CAMP.HHN. ML:1.3 0.000029500000000000002 1.22 AML other m 2020-07-27T12:09:44.83
IV.CAMP.HHE. ML:1.3 0.000030900000000000006 1.1 AML other m 2020-07-27T12:09:44.28
IV.GUMA.HNE. ML:2.1 0.00020750000000000003 0.52 AML other m 2020-07-27T12:09:44.40
IV.GUMA.HHE. ML:2.2 0.00022549999999999998 0.44 AML other m 2020-07-27T12:09:47.17
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