Earthquake with magnitude of ML 1.2 on date 16-11-2021 and time 12:55:51 (UTC) in region 2 km E Massa Martana (PG)

A magnitude ML 1.2 earthquake occured in region: 2 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) 42.7700, 12.5500 at 8 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.

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 2 3770 3770
Giano dell'Umbria PG 8 3846 7616
Acquasparta TR 9 4778 12394
Castel Ritaldi PG 12 3278 15672
Todi PG 12 16851 32523
Montecastrilli TR 14 5022 37545
Gualdo Cattaneo PG 16 6155 43700
Spoleto PG 16 38218 81918
Avigliano Umbro TR 16 2558 84476
Montefalco PG 16 5679 90155
Collazzone PG 17 3473 93628
San Gemini TR 17 5018 98646
Fratta Todina PG 18 1839 100485
Monte Castello di Vibio PG 18 1567 102052
Bevagna PG 19 5081 107133
Campello sul Clitunno PG 19 2442 109575

Municipalities with at least 50000 inhabitants

An earthquake occurred to
24 Km SW of Foligno (57155 inhabitants)
25 Km NW of Terni (111501 inhabitants)
40 Km SE of Perugia (166134 inhabitants)
53 Km NE of Viterbo (67173 inhabitants)
84 Km NW of L'Aquila (69753 inhabitants)
87 Km N of Guidonia Montecelio (88673 inhabitants)
92 Km N of Tivoli (56533 inhabitants)
95 Km SE of Arezzo (99543 inhabitants)
95 Km W of Teramo (54892 inhabitants)
98 Km NE of Civitavecchia (52991 inhabitants)
98 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 2021-11-16
12:55:51
42.7703 12.5498 8 2022-03-30
13:04:16
Bollettino Sismico Italiano INGV 97529141
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 ± 0.07
Latitude 42.7703 ± 0.0036
Longitude 12.5498 ± 0.0061
Depth (km) 8 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 97529141

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 523
Semi-minor axis of confidence ellipse (meter) 295
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) 520.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 111
Number of associated phases, regardless of their use for origin computation 31
Number of defining phases 17
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.22
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.53420
Number of stations at which the event was observed 22
Number of stations from which data was used for origin computation 9
Magnitudes information

ML:1.2

Field Value
Value 1.2
Uncertainty 0.1
Num. used stations 2
Type of magnitude ML
Reference to an origin 97529141
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-11-17 21:36:37

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(km) 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.PII.HHZ. 2021-11-16T12:56:24.44 3.0 negative manual Pg -0.42 0
IV.CESI.HHZ. 2021-11-16T12:56:04.83 0.3 undecidable manual S 48 38.8278 50 0.18 68
IV.MGAB.HHZ. 2021-11-16T12:56:04.51 0.3 undecidable manual S 294 38.9277 50 -0.17 69
IV.SRES.HHZ. 2021-11-16T12:56:02.03 0.3 undecidable manual P 183 59.2962 50 -0.03 68
IV.ASSB.HHN. 2021-11-16T12:56:02.39 0.3 undecidable manual S 16 31.4463 104 0.08 71
IV.ARRO.EHZ. 2021-11-16T12:56:01.65 1.0 undecidable manual S 140 27.5502 106 0.65 21
IV.GAVE.EHZ. 2021-11-16T12:56:01.66 0.3 undecidable manual S 107 29.3484 105 0.05 71
IV.MGAB.HHZ. 2021-11-16T12:55:59.02 0.1 undecidable manual P 294 38.9277 50 0.09 93
IV.CESI.HHZ. 2021-11-16T12:55:58.66 0.1 undecidable manual P 48 38.8278 50 -0.25 90
IV.CESX.HHZ. 2021-11-16T12:55:57.76 0.3 undecidable manual S 170 18.1707 113 -0.17 71
IV.ASSB.HHN. 2021-11-16T12:55:57.79 0.1 undecidable manual P 16 31.4463 104 0.23 92
IV.GAVE.EHZ. 2021-11-16T12:55:56.95 0.1 undecidable manual P 107 29.3484 105 -0.21 92
IV.ARRO.EHZ. 2021-11-16T12:55:56.50 0.1 undecidable manual P 140 27.5502 106 -0.31 91
IV.CESX.HHZ. 2021-11-16T12:55:55.54 0.1 undecidable manual P 170 18.1707 113 0.51 88
IV.MOMA.HHZ. 2021-11-16T12:55:54.01 0.3 undecidable manual S 24 4.0959 152 -0.08 74
IT.GNU.HGE. 2021-11-16T12:55:53.97 0.1 undecidable manual S 24 4.0959 152 -0.12 98
IT.GNU.HGE. 2021-11-16T12:55:52.84 0.1 negative manual P 24 4.0959 152 0.03 100
IV.MOMA.HHZ. 2021-11-16T12:55:52.84 0.1 negative manual P 24 4.0959 152 0.03 100
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
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