Earthquake with magnitude of ML 1.2 on date 16-11-2021 and time 12:55:51 (UTC) in region 3 km E Massa Martana (PG)

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

  • 16-11-2021 12:55:51 (UTC)
  • 16-11-2021 13:55:51 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.778, 12.563 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 3 3770 3770
Giano dell'Umbria PG 6 3846 7616
Acquasparta TR 10 4778 12394
Castel Ritaldi PG 10 3278 15672
Todi PG 13 16851 32523
Gualdo Cattaneo PG 15 6155 38678
Montefalco PG 15 5679 44357
Spoleto PG 15 38218 82575
Montecastrilli TR 15 5022 87597
Collazzone PG 17 3473 91070
Avigliano Umbro TR 18 2558 93628
Bevagna PG 18 5081 98709
Campello sul Clitunno PG 18 2442 101151
Fratta Todina PG 18 1839 102990
San Gemini TR 18 5018 108008
Monte Castello di Vibio PG 19 1567 109575
Trevi PG 19 8469 118044

Municipalities with at least 50000 inhabitants

An earthquake occurred to
23 Km SW of Foligno (57155 inhabitants)
25 Km N of Terni (111501 inhabitants)
39 Km SE of Perugia (166134 inhabitants)
55 Km NE of Viterbo (67173 inhabitants)
83 Km NW of L'Aquila (69753 inhabitants)
88 Km N of Guidonia Montecelio (88673 inhabitants)
93 Km N of Tivoli (56533 inhabitants)
94 Km W of Teramo (54892 inhabitants)
94 Km SE of Arezzo (99543 inhabitants)
99 Km N of Roma (2864731 inhabitants)
99 Km NE of Civitavecchia (52991 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 earthquake resentment in the area, expressed in terms of intensity on the MCS scale (Mercalli-Cancani-Sieberg). Intensities are determined using data from questionnaires collected on the website http://www.hsit.it. The intensities shown are determined considering all the reports received from each municipality, and are all the more reliable the greater the number of questionnaires. The collected data are subjected to an automatic statistical filter, but are not checked individually. In particular, intensities greater than or equal to the VI degree of the MCS or EMS scale require on-site verification by specialized personnel. The black star is the epicenter of the earthquake that occurred. This map is updated every time citizens fill out new questionnaires. The number of questionnaires processed to obtain this map, the date and time of the last update are shown at the top right.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100
ML 1.2 2021-11-16
12:55:51
42.7782 12.5633 8 2021-11-16
13:06:53
Sala Sismica INGV-Roma 97492761
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-11-16 12:55:51 ± 0.14
Latitude 42.7782 ± 0.0099
Longitude 12.5633 ± 0.0135
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 97492761

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1206
Semi-minor axis of confidence ellipse (meter) 864
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 56
Circular confidence region, given by single value of horizontal uncertainty (meter) 1210
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 108
Number of associated phases, regardless of their use for origin computation 29
Number of defining phases 10
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.36
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.54229
Number of stations at which the event was observed 23
Number of stations from which data was used for origin computation 6
Magnitude information

ML:1.2

Field Value
Value 1.2
Uncertainty 0.1
Num. used stations 2
Type of magnitude ML
Reference to an origin 97492761
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-11-16 13:06:53
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.GRIS.EHZ. 2021-11-16T12:57:47.80 3.0 undecidable manual Sg 5.73 0
IV.APPI.EHZ. 2021-11-16T12:57:44.54 3.0 undecidable manual Sg 4.11 0
IV.SGAL.EHZ. 2021-11-16T12:57:33.19 3.0 undecidable manual Sg 7.53 0
IX.PGN3.HHZ.02 2021-11-16T12:57:28.50 3.0 undecidable manual Sn 2.06 0
IV.PZUN.HHZ. 2021-11-16T12:57:26.84 3.0 undecidable manual Sn 1.47 0
IV.GIZZ.HHZ. 2021-11-16T12:57:18.74 3.0 positive manual Pg 13.84 0
IV.ERC.EHZ. 2021-11-16T12:57:14.04 3.0 undecidable manual Pg 8.79 0
IV.MARS.HNZ. 2021-11-16T12:57:10.64 3.0 undecidable manual Pn 1.49 0
IV.TDS.HHZ. 2021-11-16T12:57:10.04 3.0 undecidable manual Pg 11.6 0
IV.SGAL.EHZ. 2021-11-16T12:56:54.13 3.0 positive manual Pg 9.07 0
IV.VOBA.EHZ. 2021-11-16T12:56:47.47 3.0 negative manual Pg 2.36 0
IV.NDIM.HHZ. 2021-11-16T12:56:34.05 3.0 negative manual Pn -0.13 0
IV.MSSA.HHZ. 2021-11-16T12:56:33.99 3.0 undecidable manual Pn -3.69 0
IV.VCEL.EHZ. 2021-11-16T12:56:28.23 3.0 undecidable manual S -2.44 0
IV.PE3.EHZ. 2021-11-16T12:56:25.32 3.0 undecidable manual S -2.77 0
IV.PII.HHZ. 2021-11-16T12:56:24.44 3.0 negative manual Pg -0.42 0
IV.TOLF.HHZ. 2021-11-16T12:56:19.22 3.0 undecidable manual S -3.98 0
IV.VCEL.EHZ. 2021-11-16T12:56:10.84 3.0 undecidable manual P -3.33 0
IV.MGAB.HHZ. 2021-11-16T12:56:05.08 0.3 undecidable manual S 292 0.357 50 -0.07 71
IV.MTL1.HNZ. 2021-11-16T12:56:05.57 3.0 positive manual P -0.95 0
IV.SRES.HHZ. 2021-11-16T12:56:02.28 0.1 undecidable manual P 184 0.5423 50 -0.2 89
IV.GAVE.EHZ. 2021-11-16T12:56:02.39 0.6 undecidable manual S 109 0.2572 105 0.78 39
IV.MGAB.HHZ. 2021-11-16T12:55:59.71 0.1 undecidable manual P 292 0.357 50 0.4 88
IV.CESI.HHZ. 2021-11-16T12:55:58.74 0.1 undecidable manual P 48 0.3372 50 -0.24 92
IV.CESX.HHZ. 2021-11-16T12:55:57.88 0.6 undecidable manual S 174 0.17 112 -0.54 44
IV.GAVE.EHZ. 2021-11-16T12:55:57.08 0.1 undecidable manual P 109 0.2572 105 -0.19 94
IV.CESX.HHZ. 2021-11-16T12:55:55.93 0.3 undecidable manual P 174 0.17 112 0.5 67
IV.MOMA.HHZ. 2021-11-16T12:55:54.14 0.3 undecidable manual S 11 0.0261 159 -0.03 76
IV.MOMA.HHZ. 2021-11-16T12:55:52.86 0.1 negative manual P 11 0.0261 159 -0.12 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CESX.HHN. ML:1.3 0.000156 0.42 AML other m 2021-11-16T12:56:01.49
IV.CESX.HHE. ML:1.2 0.0001255 0.58 AML other m 2021-11-16T12:56:01.27
IV.PII.HHE. ML:2.5 9.435E-5 0.52 AML other m 2021-11-16T12:56:30.04
IV.PII.HHN. ML:2.4 7.305E-5 0.46 AML other m 2021-11-16T12:56:41.60
IV.APPI.EHN. ML:3.5 0.0001645 0.06 AML other m 2021-11-16T12:57:48.91
IV.APPI.EHE. ML:3.6 0.0001825 1.66 AML other m 2021-11-16T12:57:51.86
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