Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.9 on date 17-03-2023 and time 04:11:25 (UTC) in region 5 km SE Polino (TR)

A magnitude ML 0.9 earthquake occured in region: 5 km SE Polino (TR), on

  • 17-03-2023 04:11:25 (UTC)
  • 17-03-2023 05:11:25 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.5610, 12.8890 at 12 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.

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Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Polino TR 5 233 233
Rivodutri RI 6 1253 1486
Morro Reatino RI 6 373 1859
Leonessa RI 6 2435 4294
Poggio Bustone RI 7 2055 6349
Labro RI 8 374 6723
Arrone TR 10 2763 9486
Cantalice RI 10 2755 12241
Ferentillo TR 11 1913 14154
Montefranco TR 11 1276 15430
Colli sul Velino RI 11 533 15963
Monteleone di Spoleto PG 11 599 16562
Greccio RI 15 1558 18120
Poggiodomo PG 17 117 18237
Rieti RI 17 47698 65935
Posta RI 18 694 66629
Scheggino PG 18 461 67090
Micigliano RI 18 127 67217
Contigliano RI 19 3783 71000
Sant'Anatolia di Narco PG 20 564 71564
Stroncone TR 20 4917 76481
Terni TR 20 111501 187982
Cittaducale RI 20 6828 194810

Municipalities with at least 50000 inhabitants

An earthquake occurred to
20 Km E of Terni (111501 inhabitants)
47 Km SE of Foligno (57155 inhabitants)
48 Km W of L'Aquila (69753 inhabitants)
64 Km N of Guidonia Montecelio (88673 inhabitants)
66 Km E of Viterbo (67173 inhabitants)
67 Km N of Tivoli (56533 inhabitants)
68 Km W of Teramo (54892 inhabitants)
73 Km SE of Perugia (166134 inhabitants)
81 Km NE of Roma (2864731 inhabitants)
98 Km N of Velletri (53303 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
Reviewed
Rev100 		ML 0.9 2023-03-17
04:11:25		 42.5613 12.8892 12 2023-03-17
04:21:32		 Sala Sismica INGV-Roma 115458091
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-03-17 04:11:25 ± 0.05
Latitude 42.5613 ± 0.0036
Longitude 12.8892 ± 0.0037
Depth (km) 12 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 115458091

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 397
Semi-minor axis of confidence ellipse (meter) 69
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 7
Circular confidence region, given by single value of horizontal uncertainty (meter) 400.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 119
Number of associated phases, regardless of their use for origin computation 13
Number of defining phases 11
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.09
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.42808
Number of stations at which the event was observed 8
Number of stations from which data was used for origin computation 7
Magnitude information

ML:0.9

Field Value
Value 0.9
Uncertainty 0.3
Num. used stations 7
Type of magnitude ML
Reference to an origin 115458091
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-03-17 04:21:32
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.RMVT.HGZ. 2023-03-17T04:11:36.49 3.0 undecidable manual S 0
IV.RM33.EHZ. 2023-03-17T04:11:35.80 0.6 undecidable manual S 102 27.2505 95 0.08 49
IV.SRES.HHZ. 2023-03-17T04:11:34.71 0.6 undecidable manual P 221 47.5191 92 -0.02 48
IV.ORTE.EHE. 2023-03-17T04:11:33.95 0.1 undecidable manual P 255 42.7239 92 -0.04 96
IV.RMVT.HGZ. 2023-03-17T04:11:33.28 3.0 undecidable manual P 0
IV.GAVE.EHE. 2023-03-17T04:11:32.34 0.6 undecidable manual S 2 14.4744 111 -0.05 50
IV.RM33.EHZ. 2023-03-17T04:11:31.49 1.0 positive manual P 102 27.2505 95 -0.11 24
IV.ARRO.EHZ. 2023-03-17T04:11:31.28 0.6 undecidable manual S 281 10.2786 127 -0.12 50
IV.LNSS.HHZ. 2023-03-17T04:11:31.92 0.6 undecidable manual S 69 13.1757 116 -0.14 49
IV.CESX.HHN. 2023-03-17T04:11:31.23 0.1 undecidable manual P 282 25.2525 96 -0.07 99
IV.LNSS.HHZ. 2023-03-17T04:11:29.62 1.0 positive manual P 69 13.1757 116 0.13 25
IV.GAVE.EHE. 2023-03-17T04:11:29.78 0.1 undecidable manual P 2 14.4744 111 0.1 100
IV.ARRO.EHZ. 2023-03-17T04:11:29.24 0.1 positive manual P 281 10.2786 127 0.13 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.LNSS.HHE. ML:1.3 0.0001865 0.1 AML other m 2023-03-17T04:11:32.30
IV.LNSS.HHN. ML:1.1 0.000111 0.12 AML other m 2023-03-17T04:11:32.48
IV.ARRO.EHE. ML:0.8 0.00006579523500000001 0.1792 AML other m 2023-03-17T04:11:31.70
IV.ARRO.EHN. ML:0.7 0.000056467715 0.1408 AML other m 2023-03-17T04:11:32.06
IV.LNSS.HNE. ML:1.2 0.00016537520550000001 0.0896 AML other m 2023-03-17T04:11:32.30
IV.RM33.EHE. ML:0.6 0.000021794395000000002 0.4992 AML other m 2023-03-17T04:11:36.41
IV.RM33.EHN. ML:0.7 0.000023400135000000002 0.8608 AML other m 2023-03-17T04:11:35.98
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