Earthquake with magnitude of ML 1.5 on date 13-08-2020 and time 02:38:28 (UTC) in region 6 km SE Massa Martana (PG)

A magnitude ML 1.5 earthquake occured in region: 6 km SE Massa Martana (PG), on

  • 13-08-2020 02:38:28 (UTC)
  • 13-08-2020 04:38:28 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.74, 12.59 at 7 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.

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 7 3770 3770
Acquasparta TR 7 4778 8548
Giano dell'Umbria PG 10 3846 12394
Castel Ritaldi PG 11 3278 15672
Spoleto PG 12 38218 53890
Montecastrilli TR 13 5022 58912
San Gemini TR 15 5018 63930
Todi PG 15 16851 80781
Avigliano Umbro TR 16 2558 83339
Campello sul Clitunno PG 18 2442 85781
Montefalco PG 18 5679 91460
Gualdo Cattaneo PG 19 6155 97615
Trevi PG 20 8469 106084

Municipalities with at least 50000 inhabitants

An earthquake occurred to
21 Km N of Terni (111501 inhabitants)
26 Km SW of Foligno (57155 inhabitants)
44 Km SE of Perugia (166134 inhabitants)
54 Km NE of Viterbo (67173 inhabitants)
79 Km NW of L'Aquila (69753 inhabitants)
83 Km N of Guidonia Montecelio (88673 inhabitants)
88 Km N of Tivoli (56533 inhabitants)
92 Km W of Teramo (54892 inhabitants)
95 Km N of Roma (2864731 inhabitants)
97 Km NE of Civitavecchia (52991 inhabitants)
99 Km SE of Arezzo (99543 inhabitants)
Recent and historical Seismicity
Seismic hazard
Shakemap
Felt maps
The earthquake effects in MCS scale as obtained from the compiled questionnaire

The earthquake effects in MCS scale as obtained from the compiled questionnaire

This map shows the distribution of the effects of the earthquake on the territory in terms of the MCS (Mercalli-Cancani-Sieberg) intensity scale. The intensities are determined using the data provided in the questionnaire (http://www.haisentitoilterremoto.it/) that are analysed using robust statistical techniques since they are not verified individually. Specifically, the assignment of MCS intensities greater or equal the VI degree of the MCS scale require opportune in situ verification by professional experts. The purple start shows the epicenter. This map is prepared every so often that the population fill in new questionnaires. The number of questionnaires used to determine the map and the date and time of the last adjournment are shown in the upper right part of the panel.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100
ML 1.5 2020-08-13
02:38:28
42.74 12.59 7 2020-08-13
02:44:58
Sala Sismica INGV-Roma 81926581
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-08-13 02:38:28 ± 0.06
Latitude 42.74 ± 0.00
Longitude 12.59 ± 0.01
Depth (km) 7 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 81926581

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 695
Semi-minor axis of confidence ellipse (meter) 214
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 266
Circular confidence region, given by single value of horizontal uncertainty (meter) 700
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 151
Number of associated phases, regardless of their use for origin computation 31
Number of defining phases 25
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.17
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.69518
Number of stations at which the event was observed 27
Number of stations from which data was used for origin computation 21
Magnitude information

ML:1.5

Field Value
Value 1.5
Uncertainty 0.3
Num. used stations 38
Type of magnitude ML
Reference to an origin 81926581
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-08-13 02:44:58
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.IOCA.HHZ. 2020-08-13T02:39:29.90 3.0 undecidable manual Sn -3.28 0
IV.FIR.HHZ. 2020-08-13T02:38:56.77 3.0 undecidable manual P 3.64 0
IV.MNTT.EHZ. 2020-08-13T02:38:45.10 3.0 negative manual P 0.66 0
IV.EL6.EHZ. 2020-08-13T02:38:42.11 0.6 undecidable manual P 32 0.6952 50 0.22 43
IV.MF5.EHZ. 2020-08-13T02:38:42.59 3.0 positive manual P 0.37 0
IV.ATMI.HHZ. 2020-08-13T02:38:41.68 0.6 undecidable manual P 338 0.6349 50 0.81 36
IV.FIAM.HHZ. 2020-08-13T02:38:40.21 0.3 undecidable manual P 141 0.6142 50 -0.3 64
IV.MMO1.EHZ. 2020-08-13T02:38:39.66 0.3 undecidable manual P 74 0.563 50 0.03 68
IV.CSP1.EHZ. 2020-08-13T02:38:39.75 0.3 undecidable manual P 52 0.5693 50 0.01 69
IV.ASSB.HHZ. 2020-08-13T02:38:39.97 0.3 undecidable manual S 10 0.3031 102 -0.07 72
IV.SMA1.EHZ. 2020-08-13T02:38:39.83 0.3 undecidable manual P 101 0.5594 50 0.25 65
IV.RM33.EHZ. 2020-08-13T02:38:38.55 0.3 undecidable manual P 117 0.5162 50 -0.28 66
IV.SRES.HHZ. 2020-08-13T02:38:38.80 0.3 undecidable manual P 187 0.5099 50 0.08 69
IV.MC2.EHZ. 2020-08-13T02:38:38.30 0.3 undecidable manual P 69 0.4703 50 0.25 67
IV.MURB.HHZ. 2020-08-13T02:38:38.75 0.3 undecidable manual P 355 0.5216 50 -0.17 67
IV.SACS.HHZ. 2020-08-13T02:38:37.74 3.0 negative manual P -0.09 0
IV.ATCC.EHZ. 2020-08-13T02:38:37.45 0.6 undecidable manual P 5 0.4425 50 -0.13 46
IV.FDMO.HHZ. 2020-08-13T02:38:37.93 0.6 undecidable manual P 51 0.4676 50 -0.07 46
IV.NRCA.HHZ. 2020-08-13T02:38:36.72 0.3 undecidable manual P 77 0.3957 50 -0.05 71
IV.MGAB.HHZ. 2020-08-13T02:38:35.50 3.0 negative manual P -0.17 0
IV.CESI.HHZ. 2020-08-13T02:38:35.78 0.3 undecidable manual P 41 0.3489 50 -0.19 69
IV.LNSS.HHZ. 2020-08-13T02:38:35.93 0.6 undecidable manual P 113 0.3597 50 -0.23 46
IV.ASSB.HHZ. 2020-08-13T02:38:34.73 0.6 undecidable manual P 10 0.3031 102 -0.26 46
IV.CESX.HHZ. 2020-08-13T02:38:33.78 0.3 undecidable manual S 181 0.1349 116 -0.09 73
IV.GAVE.EHZ. 2020-08-13T02:38:33.59 0.3 undecidable manual P 103 0.2293 106 0.18 71
IV.ARRO.EHZ. 2020-08-13T02:38:33.20 0.3 undecidable manual P 142 0.2095 107 0.23 70
IV.CESX.HHZ. 2020-08-13T02:38:31.41 0.3 undecidable manual P 181 0.1349 116 -0.02 75
IV.MOMA.HHZ. 2020-08-13T02:38:31.51 0.3 undecidable manual S 347 0.0621 137 -0.05 75
IT.GNU.HGZ. 2020-08-13T02:38:31.54 0.3 undecidable manual S 347 0.0621 137 -0.02 76
IV.MOMA.HHZ. 2020-08-13T02:38:30.16 0.1 undecidable manual P 347 0.0621 137 0.06 100
IT.GNU.HGZ. 2020-08-13T02:38:30.11 0.3 undecidable manual P 347 0.0621 137 0.01 76
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MOMA.HHN. ML:2 0.00179 1.18 AML other m 2020-08-13T02:38:32.03
IV.MOMA.HNN. ML:1.9 0.001635 1.18 AML other m 2020-08-13T02:38:32.03
IV.MOMA.HNE. ML:1.9 0.0014 0.52 AML other m 2020-08-13T02:38:32.15
IV.MOMA.HHE. ML:1.9 0.001495 0.52 AML other m 2020-08-13T02:38:32.15
IV.CESX.HHN. ML:1.8 0.000604 1.12 AML other m 2020-08-13T02:38:34.73
IV.CESX.HHE. ML:1.7 0.000569 0.42 AML other m 2020-08-13T02:38:36.62
IV.ARRO.EHE. ML:1.4 0.0001855 0.32 AML other m 2020-08-13T02:38:37.64
IV.ARRO.EHN. ML:1.6 0.0002455 1.08 AML other m 2020-08-13T02:38:39.37
IV.ASSB.HHN. ML:1.3 9.655E-5 0.8 AML other m 2020-08-13T02:38:40.60
IV.GAVE.EHN. ML:1.4 0.000159 0.86 AML other m 2020-08-13T02:38:41.17
IV.ASSB.HHE. ML:1.3 8.015E-5 0.8 AML other m 2020-08-13T02:38:42.86
IV.CESI.HHE. ML:1.3 7.865E-5 0.48 AML other m 2020-08-13T02:38:42.33
IV.CESI.HHN. ML:1.5 0.000119 0.36 AML other m 2020-08-13T02:38:42.68
IV.GAVE.EHE. ML:1.4 0.00017 1.74 AML other m 2020-08-13T02:38:42.07
IV.MGAB.HHE. ML:1.9 0.000239 1.06 AML other m 2020-08-13T02:38:43.76
IV.MGAB.HHN. ML:1.8 0.0002105 0.26 AML other m 2020-08-13T02:38:43.49
IV.LNSS.HHN. ML:1.5 0.0001095 0.36 AML other m 2020-08-13T02:38:44.36
IV.LNSS.HHE. ML:1.5 0.000121 0.58 AML other m 2020-08-13T02:38:45.83
IV.NRCA.HHN. ML:1.5 0.0001033 1.88 AML other m 2020-08-13T02:38:45.00
IV.NRCA.HHE. ML:1.5 0.000104 0.14 AML other m 2020-08-13T02:38:46.59
IV.FDMO.HHE. ML:1.3 5.48E-5 0.28 AML other m 2020-08-13T02:38:46.63
IV.FDMO.HHN. ML:1.4 6.42E-5 1.72 AML other m 2020-08-13T02:38:46.91
IV.SRES.HHE. ML:1 2.48E-5 1.32 AML other m 2020-08-13T02:38:46.98
IV.ATCC.EHE. ML:1.5 8.335E-5 0.24 AML other m 2020-08-13T02:38:47.24
IV.ATCC.EHN. ML:1.4 6.995E-5 0.56 AML other m 2020-08-13T02:38:47.58
IV.SACS.HHE. ML:1.2 4.115E-5 0.78 AML other m 2020-08-13T02:38:47.19
IV.SRES.HHN. ML:1 2.175E-5 0.82 AML other m 2020-08-13T02:38:48.90
IV.RM33.EHN. ML:1.3 4.11E-5 1.1 AML other m 2020-08-13T02:38:49.67
IV.SACS.HHN. ML:1.1 3.205E-5 1.72 AML other m 2020-08-13T02:38:50.86
IV.RM33.EHE. ML:1.4 4.975E-5 0.28 AML other m 2020-08-13T02:38:50.57
IV.MURB.HHN. ML:2 0.0002125 0.42 AML other m 2020-08-13T02:38:50.79
IV.FIAM.HHE. ML:0.9 1.405E-5 0.5 AML other m 2020-08-13T02:38:51.85
IV.SMA1.EHE. ML:1.6 8.03E-5 0.7 AML other m 2020-08-13T02:38:51.27
IV.MURB.HHE. ML:1.8 0.0001405 0.78 AML other m 2020-08-13T02:38:52.07
IV.FIAM.HHN. ML:1.1 1.915E-5 0.3 AML other m 2020-08-13T02:38:54.56
IV.ATMI.HHN. ML:2 0.0001705 0.38 AML other m 2020-08-13T02:38:54.74
IV.ATMI.HHE. ML:1.9 0.000124 0.34 AML other m 2020-08-13T02:38:56.13
IV.SMA1.EHN. ML:1.6 7.14E-5 0.68 AML other m 2020-08-13T02:38:56.62
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download