Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.2 on date 24-01-2020 and time 00:06:08 (Italy) in region 3 km E Massa Martana (PG)

A magnitude ML 1.2 earthquake occured in region: 3 km E Massa Martana (PG), on

  • 23-01-2020 23:06:08 (UTC)
  • 24-01-2020 00:06:08 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.7860, 12.5570 at 6 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 3 3770 3770
Giano dell'Umbria PG 6 3846 7616
Castel Ritaldi PG 10 3278 10894
Acquasparta TR 11 4778 15672
Todi PG 12 16851 32523
Gualdo Cattaneo PG 14 6155 38678
Montefalco PG 14 5679 44357
Collazzone PG 16 3473 47830
Spoleto PG 16 38218 86048
Montecastrilli TR 16 5022 91070
Bevagna PG 17 5081 96151
Fratta Todina PG 17 1839 97990
Monte Castello di Vibio PG 18 1567 99557
Avigliano Umbro TR 18 2558 102115
Campello sul Clitunno PG 18 2442 104557
Trevi PG 19 8469 113026
San Gemini TR 19 5018 118044

Municipalities with at least 50000 inhabitants

An earthquake occurred to
22 Km SW of Foligno (57155 inhabitants)
26 Km N of Terni (111501 inhabitants)
38 Km SE of Perugia (166134 inhabitants)
55 Km NE of Viterbo (67173 inhabitants)
84 Km NW of L'Aquila (69753 inhabitants)
88 Km N of Guidonia Montecelio (88673 inhabitants)
93 Km SE of Arezzo (99543 inhabitants)
94 Km N of Tivoli (56533 inhabitants)
95 Km W of Teramo (54892 inhabitants)
99 Km NE of Civitavecchia (52991 inhabitants)
99 Km N of Roma (2864731 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 1.2 2020-01-23
23:06:08		 42.7865 12.5573 6 2020-07-18
21:08:25		 Bollettino Sismico Italiano INGV 77174311
Reviewed
Rev100 		ML 1.2 2020-01-23
23:06:08		 42.7828 12.5662 6 2020-01-23
23:38:01		 Sala Sismica INGV-Roma 75780951
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-01-23 23:06:08 ± 0.05
Latitude 42.7865 ± 0.0027
Longitude 12.5573 ± 0.0037
Depth (km) 6 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 77174311

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 354
Semi-minor axis of confidence ellipse (meter) 87
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 240
Circular confidence region, given by single value of horizontal uncertainty (meter) 350.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 118
Number of associated phases, regardless of their use for origin computation 21
Number of defining phases 18
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.14
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.57467
Number of stations at which the event was observed 11
Number of stations from which data was used for origin computation 9
Magnitudes information

ML:1.2

Field Value
Value 1.2
Uncertainty 0.2
Num. used stations 8
Type of magnitude ML
Reference to an origin 75780951
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-01-23 23:38:01

ML:1.2

Field Value
Value 1.2
Uncertainty 0.2
Num. used stations 8
Type of magnitude ML
Reference to an origin 77174311
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-03-10 15:27:15
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MODR.HHZ. 2020-01-23T23:06:42.93 3.0 undecidable manual Sn -6.15 0
IV.MMO1.EHZ. 2020-01-23T23:06:29.10 0.6 undecidable manual S 78 63.7917 50 0 45
IV.LAV9.HHZ. 2020-01-23T23:06:29.22 3.0 undecidable manual Sg 0.46 0
IV.MURB.HHZ. 2020-01-23T23:06:26.32 0.6 undecidable manual S 357 52.9026 50 0.13 45
IV.MGAB.HHZ. 2020-01-23T23:06:22.27 0.6 undecidable manual S 291 38.8278 99 0.17 46
IV.MMO1.EHZ. 2020-01-23T23:06:20.02 0.3 undecidable manual P 78 63.7917 50 -0.36 63
IV.ASSB.HHZ. 2020-01-23T23:06:19.12 0.6 undecidable manual S 16 29.5482 101 0.17 47
IV.GAVE.EHZ. 2020-01-23T23:06:19.00 0.6 undecidable manual S 111 29.3484 102 0.12 47
IV.MURB.HHZ. 2020-01-23T23:06:18.53 0.3 undecidable manual P 357 52.9026 50 -0.17 67
IV.ARRO.EHZ. 2020-01-23T23:06:18.89 0.6 undecidable manual S 143 28.5492 102 0.28 46
IV.LAV9.HNZ. 2020-01-23T23:06:16.87 3.0 undecidable manual P -0.71 0
IV.MGAB.HHZ. 2020-01-23T23:06:16.32 0.3 undecidable manual P 291 38.8278 99 -0.02 71
IV.CESX.HHZ. 2020-01-23T23:06:15.42 0.6 undecidable manual S 173 19.869 107 -0.26 47
IV.GAVE.EHZ. 2020-01-23T23:06:14.56 0.3 undecidable manual P 111 29.3484 102 0.08 71
IV.ASSB.HHZ. 2020-01-23T23:06:14.57 0.3 undecidable manual P 16 29.5482 101 0.05 72
IV.ARRO.EHZ. 2020-01-23T23:06:14.38 0.3 undecidable manual P 143 28.5492 102 0.05 72
IV.CESX.HHZ. 2020-01-23T23:06:12.67 0.3 undecidable manual P 173 19.869 107 0.03 73
IV.MOMA.HNZ. 2020-01-23T23:06:10.48 0.3 undecidable manual S 28 2.1978 160 -0.21 73
IT.GNU.HGZ. 2020-01-23T23:06:10.54 0.6 undecidable manual S 29 2.1978 160 -0.15 49
IV.MOMA.HNZ. 2020-01-23T23:06:09.82 0.1 undecidable manual P 28 2.1978 160 0.07 100
IT.GNU.HGZ. 2020-01-23T23:06:09.82 0.1 undecidable manual P 29 2.1978 160 0.07 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CESX.HHE. ML:1.2 0.000133 1.58 AML other m 2020-01-23T23:06:17.81
IV.CESX.HHN. ML:1.2 0.00013900000000000002 0.22 AML other m 2020-01-23T23:06:17.26
IV.GAVE.EHN. ML:1.1 0.0000651 0.28 AML other m 2020-01-23T23:06:21.79
IV.GAVE.EHE. ML:1.0 0.00005145 0.28 AML other m 2020-01-23T23:06:24.25
IV.MGAB.HHN. ML:1.1 0.00004825 0.98 AML other m 2020-01-23T23:06:24.69
IV.MGAB.HHE. ML:1.0 0.00003315 0.42 AML other m 2020-01-23T23:06:24.62
IV.MURB.HHE. ML:1.4 0.00006115 0.42 AML other m 2020-01-23T23:06:28.50
IV.MURB.HHN. ML:1.5 0.00007725 0.42 AML other m 2020-01-23T23:06:29.39
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