Earthquake with magnitude of ML 0.7 on date 03-09-2021 and time 20:45:38 (UTC) in region Massa Martana (PG)

A magnitude ML 0.7 earthquake occured in region: Massa Martana (PG), on

  • 03-09-2021 20:45:38 (UTC)
  • 03-09-2021 22:45:38 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.779, 12.521 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 0 3770 3770
Giano dell'Umbria PG 8 3846 7616
Todi PG 9 16851 24467
Acquasparta TR 10 4778 29245
Castel Ritaldi PG 13 3278 32523
Montecastrilli TR 15 5022 37545
Collazzone PG 15 3473 41018
Gualdo Cattaneo PG 15 6155 47173
Fratta Todina PG 15 1839 49012
Monte Castello di Vibio PG 15 1567 50579
Avigliano Umbro TR 16 2558 53137
Montefalco PG 17 5679 58816
Spoleto PG 19 38218 97034
San Gemini TR 19 5018 102052
Bevagna PG 19 5081 107133

Municipalities with at least 50000 inhabitants

An earthquake occurred to
25 Km SW of Foligno (57155 inhabitants)
26 Km NW of Terni (111501 inhabitants)
38 Km S of Perugia (166134 inhabitants)
53 Km NE of Viterbo (67173 inhabitants)
86 Km NW of L'Aquila (69753 inhabitants)
88 Km N of Guidonia Montecelio (88673 inhabitants)
92 Km SE of Arezzo (99543 inhabitants)
93 Km N of Tivoli (56533 inhabitants)
97 Km NE of Civitavecchia (52991 inhabitants)
98 Km W of Teramo (54892 inhabitants)
99 Km N of Roma (2864731 inhabitants)
Recent and historical seismicity
Seismic hazard
Shakemap
Felt maps
Preliminary map of the earthquake effects from the web questionnaire

Preliminary map of the earthquake effects from the web 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 0.7 2021-09-03
20:45:38
42.7793 12.5212 8 2021-09-03
20:53:08
Sala Sismica INGV-Roma 95009151
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-09-03 20:45:38 ± 0.1
Latitude 42.7793 ± 0.0054
Longitude 12.5212 ± 0.0074
Depth (km) 8 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 95009151

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 631
Semi-minor axis of confidence ellipse (meter) 610
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 152
Circular confidence region, given by single value of horizontal uncertainty (meter) 630
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 130
Number of associated phases, regardless of their use for origin computation 29
Number of defining phases 15
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.26
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.58996
Number of stations at which the event was observed 22
Number of stations from which data was used for origin computation 8
Magnitude information

ML:0.7

Field Value
Value 0.7
Uncertainty 0.1
Num. used stations 10
Type of magnitude ML
Reference to an origin 95009151
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-09-03 20:53:08
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
GU.MGRO.HHZ. 2021-09-03T20:47:22.53 3.0 undecidable manual Sn 2.11 0
IV.MBAL.EHZ. 2021-09-03T20:47:10.60 3.0 undecidable manual Sn 3.44 0
OX.VARN.HHZ. 2021-09-03T20:47:09.73 3.0 undecidable manual Sn 0.74 0
MN.VAE.HHZ. 2021-09-03T20:47:01.92 3.0 positive manual Pn -1.07 0
IV.ECTS.HHZ. 2021-09-03T20:46:54.09 3.0 positive manual Pn -6.06 0
IV.NOCI.HHZ. 2021-09-03T20:46:44.61 3.0 positive manual Pn 3.23 0
CH.BERNI.HHZ. 2021-09-03T20:46:43.85 3.0 undecidable manual Pn 3.1 0
IV.VARE.HHZ. 2021-09-03T20:46:41.97 3.0 undecidable manual Pn 0.46 0
GU.GSCL.HHZ. 2021-09-03T20:46:41.89 3.0 undecidable manual Sn 0.04 0
IV.CRAC.EHZ. 2021-09-03T20:46:37.35 3.0 negative manual Pn -2.13 0
IV.CADC.EHZ. 2021-09-03T20:46:36.78 3.0 positive manual Pg 7.88 0
IX.NSC3.EHZ.02 2021-09-03T20:46:31.67 3.0 undecidable manual Pg 6.53 0
IV.FIR.HHZ. 2021-09-03T20:46:21.01 3.0 undecidable manual S -2.56 0
IV.CSP1.EHZ. 2021-09-03T20:45:59.21 0.6 undecidable manual S 58 0.59 50 0.51 43
IV.MNTT.EHZ. 2021-09-03T20:45:57.23 3.0 negative manual P 0.69 0
IV.FDMO.HHZ. 2021-09-03T20:45:55.69 0.3 undecidable manual S 58 0.4874 50 0.02 73
IV.NRCA.HHZ. 2021-09-03T20:45:54.13 0.3 undecidable manual S 83 0.438 50 -0.08 73
IV.MGAB.HHZ. 2021-09-03T20:45:50.92 0.3 undecidable manual S 294 0.3283 50 -0.02 75
IV.CSP1.EHZ. 2021-09-03T20:45:49.94 0.1 undecidable manual P 58 0.59 50 -0.06 94
IV.ASSB.HHZ. 2021-09-03T20:45:49.38 0.6 undecidable manual S 21 0.2815 105 0.05 50
IV.FDMO.HHZ. 2021-09-03T20:45:48.16 0.1 undecidable manual P 58 0.4874 50 -0.1 96
IV.NRCA.HHZ. 2021-09-03T20:45:47.09 0.1 undecidable manual P 83 0.438 50 -0.32 92
IV.CESX.HHZ. 2021-09-03T20:45:45.11 0.6 undecidable manual S 164 0.1772 113 -0.42 48
IV.MGAB.HHZ. 2021-09-03T20:45:45.36 0.1 undecidable manual P 294 0.3283 50 -0.17 97
IV.ASSB.HHZ. 2021-09-03T20:45:44.88 0.1 undecidable manual P 21 0.2815 105 0.28 96
IV.ARRO.EHZ. 2021-09-03T20:45:44.46 1.0 positive manual P 138 0.2689 105 0.14 25
IV.CESX.HHZ. 2021-09-03T20:45:42.95 0.1 undecidable manual P 164 0.1772 113 0.56 91
IV.MOMA.HHZ. 2021-09-03T20:45:41.12 0.1 undecidable manual S 56 0.0432 150 -0.3 100
IV.MOMA.HHZ. 2021-09-03T20:45:40.15 0.3 undecidable manual P 56 0.0432 150 0.12 78
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CESX.HHN. ML:0.8 5.01E-5 0.36 AML other m 2021-09-03T20:45:47.52
IV.CESX.HHE. ML:0.8 4.77E-5 0.44 AML other m 2021-09-03T20:45:49.59
IV.ASSB.HHE. ML:0.6 2.135E-5 1.18 AML other m 2021-09-03T20:45:50.19
IV.ASSB.HHN. ML:0.6 2.205E-5 1 AML other m 2021-09-03T20:45:51.29
IV.MGAB.HHE. ML:0.6 1.645E-5 0.58 AML other m 2021-09-03T20:45:53.25
IV.MGAB.HHN. ML:0.7 2.0E-5 0.94 AML other m 2021-09-03T20:45:54.59
IV.NRCA.HHE. ML:1 2.55E-5 0.74 AML other m 2021-09-03T20:45:56.37
IV.NRCA.HHN. ML:0.7 1.65E-5 1.44 AML other m 2021-09-03T20:45:56.90
IV.FDMO.HHE. ML:0.6 1.111E-5 0.4 AML other m 2021-09-03T20:46:02.18
IV.FDMO.HHN. ML:0.6 1.0885E-5 0.42 AML other m 2021-09-03T20:46:02.62
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