Earthquake with magnitude of ML 1.5 on date 01-08-2020 and time 14:36:16 (Italy) in region 1 km SW Massa Martana (PG)

A magnitude ML 1.5 earthquake occured in region: 1 km SW Massa Martana (PG), on

  • 01-08-2020 12:36:16 (UTC)
  • 01-08-2020 14:36:16 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.77, 12.51 at 8 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 1 3770 3770
Todi PG 8 16851 20621
Giano dell'Umbria PG 9 3846 24467
Acquasparta TR 9 4778 29245
Montecastrilli TR 13 5022 34267
Avigliano Umbro TR 14 2558 36825
Castel Ritaldi PG 15 3278 40103
Collazzone PG 15 3473 43576
Monte Castello di Vibio PG 15 1567 45143
Fratta Todina PG 15 1839 46982
Gualdo Cattaneo PG 16 6155 53137
San Gemini TR 18 5018 58155
Montefalco PG 18 5679 63834
Spoleto PG 19 38218 102052

Municipalities with at least 50000 inhabitants

An earthquake occurred to
26 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)
87 Km NW of L'Aquila (69753 inhabitants)
87 Km N of Guidonia Montecelio (88673 inhabitants)
93 Km N of Tivoli (56533 inhabitants)
93 Km SE of Arezzo (99543 inhabitants)
96 Km NE of Civitavecchia (52991 inhabitants)
98 Km N of Roma (2864731 inhabitants)
99 Km W of Teramo (54892 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 2020-08-01
12:36:16
42.77 12.51 8 2020-08-01
12:44:34
Sala Sismica INGV-Roma 81546291
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-08-01 12:36:16 ± 0.07
Latitude 42.77 ± 0.00
Longitude 12.51 ± 0.01
Depth (km) 8 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 81546291

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 482
Semi-minor axis of confidence ellipse (meter) 298
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 79
Circular confidence region, given by single value of horizontal uncertainty (meter) 480
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 92
Number of associated phases, regardless of their use for origin computation 43
Number of defining phases 22
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.2
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.59085
Number of stations at which the event was observed 33
Number of stations from which data was used for origin computation 14
Magnitude information

ML:1.5

Field Value
Value 1.5
Uncertainty 0.2
Num. used stations 20
Type of magnitude ML
Reference to an origin 81546291
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-08-01 12:44:34
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
SL.LJU.BHZ. 2020-08-01T12:38:07.32 3.0 undecidable manual Sg 21.190001 0
IV.SALB.HHZ. 2020-08-01T12:38:07.49 3.0 undecidable manual Sn 4.58 0
IV.FVI.HHZ. 2020-08-01T12:38:04.67 3.0 undecidable manual Sg 14.52 0
IX.CLT3.HHZ.02 2020-08-01T12:37:50.13 3.0 undecidable manual Sg 17.190001 0
IV.CAGR.HHZ. 2020-08-01T12:37:47.45 3.0 undecidable manual Pg 17.209999 0
SI.BOSI.HHZ. 2020-08-01T12:37:39.56 3.0 undecidable manual Sn -8.79 0
CH.PLONS.HHZ. 2020-08-01T12:37:34.97 3.0 undecidable manual Pg 16.290001 0
IV.SALB.HHZ. 2020-08-01T12:37:18.97 3.0 undecidable manual Pn 5.19 0
IV.NDIM.HNZ. 2020-08-01T12:37:10.26 3.0 undecidable manual Sn -2.42 0
IV.BRMO.HHZ. 2020-08-01T12:37:08.97 3.0 positive manual Pn 1.27 0
IV.ROSPO.HHZ. 2020-08-01T12:37:08.80 3.0 undecidable manual Sn -0.5 0
IV.ZONE.HHZ. 2020-08-01T12:37:06.79 3.0 undecidable manual Pg 7.08 0
GU.POPM.HHZ. 2020-08-01T12:36:56.06 3.0 undecidable manual Sg -0.57 0
IV.CAFE.HHZ. 2020-08-01T12:36:54.82 3.0 undecidable manual Pn 0.32 0
OT.OT11.EHZ. 2020-08-01T12:36:54.03 3.0 positive manual Pn 2.52 0
IV.MCRV.HHZ. 2020-08-01T12:36:51.48 3.0 undecidable manual Pn -4.72 0
IV.FIR.HHZ. 2020-08-01T12:36:48.66 3.0 undecidable manual Sg 2.68 0
IV.RIBO.EHZ.01 2020-08-01T12:36:37.48 3.0 undecidable manual Sg -0.85 0
IV.NRCA.HHZ. 2020-08-01T12:36:32.48 0.3 undecidable manual S 82 0.4479 50 0.09 69
IV.PESA.HHZ. 2020-08-01T12:36:32.44 3.0 undecidable manual Pg 1.25 0
IV.SRES.HHZ. 2020-08-01T12:36:31.23 3.0 undecidable manual Sn -2.22 0
IV.GAVE.EHZ. 2020-08-01T12:36:28.02 0.6 undecidable manual S 105 0.2932 104 0.38 44
IV.MGAB.HHZ. 2020-08-01T12:36:28.73 0.6 undecidable manual S 296 0.3238 50 0.02 48
IV.ATMI.HHZ. 2020-08-01T12:36:28.19 0.6 undecidable manual P 343 0.5909 50 0.29 43
IV.ASSB.HHN. 2020-08-01T12:36:27.40 0.3 undecidable manual S 22 0.2932 104 -0.26 68
IV.ARRO.EHZ. 2020-08-01T12:36:26.72 0.3 undecidable manual S 135 0.268 105 0.01 72
IV.MURB.HHZ. 2020-08-01T12:36:26.53 0.6 undecidable manual P 1 0.4928 50 0.31 43
IV.FDMO.HHZ. 2020-08-01T12:36:26.10 0.3 undecidable manual P 58 0.5 50 -0.25 66
IV.MC2.EHZ. 2020-08-01T12:36:26.58 0.3 undecidable manual P 74 0.518 50 -0.08 68
IV.LATE.HHE. 2020-08-01T12:36:26.33 1.0 undecidable manual P 253 0.5414 50 -0.73 19
IV.NRCA.HHZ. 2020-08-01T12:36:25.33 0.1 negative manual P 82 0.4479 50 -0.14 91
IV.ATCC.EHN. 2020-08-01T12:36:25.52 0.3 undecidable manual P 13 0.4254 50 0.44 64
IV.CESX.HHZ. 2020-08-01T12:36:23.19 0.1 undecidable manual S 161 0.1709 113 0.01 98
IV.MGAB.HHZ. 2020-08-01T12:36:23.25 0.3 undecidable manual P 296 0.3238 50 -0.09 70
IV.ARRO.EHZ. 2020-08-01T12:36:22.20 0.6 undecidable manual P 135 0.268 105 0.01 48
IV.ASSB.HHN. 2020-08-01T12:36:22.53 0.3 undecidable manual P 22 0.2932 104 -0.2 69
IV.GAVE.EHZ. 2020-08-01T12:36:22.34 0.3 undecidable manual P 105 0.2932 104 -0.38 66
IV.RIBO.EHZ.01 2020-08-01T12:36:20.43 3.0 negative manual P -5.83 0
IV.CESX.HHZ. 2020-08-01T12:36:20.13 0.1 undecidable manual P 161 0.1709 113 -0.02 98
IV.MOMA.HHZ. 2020-08-01T12:36:19.46 0.1 undecidable manual S 53 0.0558 143 -0.1 98
IT.GNU.HGE. 2020-08-01T12:36:19.54 0.1 undecidable manual S 53 0.0558 143 -0.02 100
IV.MOMA.HHZ. 2020-08-01T12:36:18.28 0.1 negative manual P 53 0.0558 143 0.22 96
IT.GNU.HGE. 2020-08-01T12:36:18.28 0.1 undecidable manual P 53 0.0558 143 0.22 96
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MOMA.HHE. ML:2.1 0.00256 1.32 AML other m 2020-08-01T12:36:19.87
IV.MOMA.HHN. ML:2 0.001995 1.24 AML other m 2020-08-01T12:36:20.10
IV.CESX.HHE. ML:1.4 0.00018 0.68 AML other m 2020-08-01T12:36:25.62
IV.CESX.HHN. ML:1.4 0.0002015 0.26 AML other m 2020-08-01T12:36:25.59
IV.ARRO.EHE. ML:1.4 0.0001159 0.2 AML other m 2020-08-01T12:36:28.15
IV.ARRO.EHN. ML:1.4 0.000115 0.66 AML other m 2020-08-01T12:36:28.49
IV.GAVE.EHE. ML:1.5 0.000139 0.96 AML other m 2020-08-01T12:36:28.63
IV.MGAB.HHN. ML:1.6 0.0001495 0.36 AML other m 2020-08-01T12:36:29.37
IV.MGAB.HHE. ML:1.7 0.0002025 0.58 AML other m 2020-08-01T12:36:29.69
IV.GAVE.EHN. ML:1.5 0.000142 0.48 AML other m 2020-08-01T12:36:30.11
IV.NRCA.HHE. ML:1.5 8.125E-5 0.38 AML other m 2020-08-01T12:36:33.54
IV.NRCA.HHN. ML:1.6 0.00010115 0.64 AML other m 2020-08-01T12:36:34.41
IV.FDMO.HHE. ML:1.4 5.4E-5 0.12 AML other m 2020-08-01T12:36:35.44
IV.FDMO.HHN. ML:1.4 5.99E-5 0.14 AML other m 2020-08-01T12:36:35.59
IV.MURB.HHN. ML:1.7 0.0001315 0.9 AML other m 2020-08-01T12:36:36.57
IV.MURB.HHE. ML:1.7 0.0001295 1.08 AML other m 2020-08-01T12:36:36.97
IV.ATMI.HHN. ML:1.7 8.955E-5 1.62 AML other m 2020-08-01T12:36:39.14
IV.SRES.HHN. ML:1 1.86E-5 0.38 AML other m 2020-08-01T12:36:40.10
IV.SRES.HHE. ML:1 2.15E-5 0.34 AML other m 2020-08-01T12:36:40.55
IV.ATMI.HHE. ML:1.7 9.61E-5 0.68 AML other m 2020-08-01T12:36:41.44
IV.NDIM.HHN. ML:3.3 0.00029 1.34 AML other m 2020-08-01T12:36:55.10
GU.POPM.HHN. ML:2.1 3.48E-5 1.1 AML other m 2020-08-01T12:36:56.68
GU.POPM.HHE. ML:1.9 2.67E-5 0.1 AML other m 2020-08-01T12:37:00.41
IV.FIR.HHN. ML:2.9 0.000425 0.46 AML other m 2020-08-01T12:37:09.59
IV.FIR.HNN. ML:3 0.0004875 0.46 AML other m 2020-08-01T12:37:09.59
IV.FIR.HNE. ML:3.2 0.0008275 0.08 AML other m 2020-08-01T12:37:09.64
IV.FIR.HHE. ML:3.3 0.0009515 0.08 AML other m 2020-08-01T12:37:09.64
IV.NDIM.HHE. ML:3.7 0.0008325 0.56 AML other m 2020-08-01T12:37:14.22
IV.BRMO.HHN. ML:2.8 2.995E-5 0.4 AML other m 2020-08-01T12:37:46.79
IV.BRMO.HHE. ML:2.7 1.77E-5 0.8 AML other m 2020-08-01T12:38:09.07
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