Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.5 on date 16-07-2023 and time 05:07:19 (Italy) in region 4 km SW Posta (RI)

A magnitude ML 0.5 earthquake occured in region: 4 km SW Posta (RI), on

  • 16-07-2023 03:07:19 (UTC)
  • 16-07-2023 05:07:19 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.5070, 13.0570 at 11 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
Posta RI 4 694 694
Micigliano RI 6 127 821
Borbona RI 6 617 1438
Leonessa RI 10 2435 3873
Antrodoco RI 10 2588 6461
Borgo Velino RI 11 972 7433
Castel Sant'Angelo RI 13 1308 8741
Cantalice RI 13 2755 11496
Poggio Bustone RI 14 2055 13551
Cagnano Amiterno AQ 15 1369 14920
Cittareale RI 15 482 15402
Montereale AQ 16 2581 17983
Cittaducale RI 16 6828 24811
Rivodutri RI 17 1253 26064
Monteleone di Spoleto PG 18 599 26663
Morro Reatino RI 19 373 27036
Polino TR 19 233 27269
Rieti RI 20 47698 74967
Barete AQ 20 737 75704

Municipalities with at least 50000 inhabitants

An earthquake occurred to
33 Km NW of L'Aquila (69753 inhabitants)
34 Km E of Terni (111501 inhabitants)
56 Km W of Teramo (54892 inhabitants)
58 Km SE of Foligno (57155 inhabitants)
63 Km NE of Guidonia Montecelio (88673 inhabitants)
64 Km NE of Tivoli (56533 inhabitants)
79 Km E of Viterbo (67173 inhabitants)
83 Km NE of Roma (2864731 inhabitants)
86 Km SE of Perugia (166134 inhabitants)
90 Km W of Montesilvano (53738 inhabitants)
93 Km W of Chieti (51815 inhabitants)
94 Km N of Velletri (53303 inhabitants)
95 Km W of Pescara (121014 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 0.5 2023-07-16
03:07:19		 42.5072 13.0567 11 2023-07-16
03:32:01		 Sala Sismica INGV-Roma 119300571
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-07-16 03:07:19 ± 0.14
Latitude 42.5072 ± 0.0090
Longitude 13.0567 ± 0.0085
Depth (km) 11 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 119300571

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1000
Semi-minor axis of confidence ellipse (meter) 650
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 11
Circular confidence region, given by single value of horizontal uncertainty (meter) 1000.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 120
Number of associated phases, regardless of their use for origin computation 14
Number of defining phases 12
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.29
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.32915
Number of stations at which the event was observed 9
Number of stations from which data was used for origin computation 7
Magnitude information

ML:0.5

Field Value
Value 0.5
Uncertainty 0.3
Num. used stations 6
Type of magnitude ML
Reference to an origin 119300571
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-07-16 03:32:01
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.SACR.HHZ. 2023-07-16T03:07:44.00 3.0 negative manual P 4.02 0
IV.NRCA.HHZ. 2023-07-16T03:07:31.55 0.3 undecidable manual S 7 36.5412 90 -0.31 71
IV.SMA1.EHZ. 2023-07-16T03:07:29.11 0.3 undecidable manual S 59 26.5512 90 -0.1 76
IV.ARRO.EHZ. 2023-07-16T03:07:28.94 0.6 undecidable manual S 289 25.0527 90 0.13 50
IV.LPEL.HHZ. 2023-07-16T03:07:28.91 3.0 undecidable manual P 0 0
IV.NRCA.HHZ. 2023-07-16T03:07:26.89 0.1 undecidable manual P 7 36.5412 90 0.19 96
IV.SMA1.EHZ. 2023-07-16T03:07:25.36 0.1 undecidable manual P 59 26.5512 90 0.19 98
IV.RM33.EHZ. 2023-07-16T03:07:25.40 0.3 undecidable manual S 89 12.876 100 -0.16 76
IV.ARRO.EHZ. 2023-07-16T03:07:25.28 0.1 undecidable manual P 289 25.0527 90 0.34 96
IV.FIAM.HNZ. 2023-07-16T03:07:25.02 0.1 undecidable manual P 169 26.9508 90 -0.22 96
IV.LNSS.HHZ. 2023-07-16T03:07:24.86 0.3 undecidable manual S 353 10.6782 116 -0.15 77
IV.GAVE.HNN. 2023-07-16T03:07:24.33 0.1 undecidable manual P 327 24.4533 90 -0.51 92
IV.RM33.EHZ. 2023-07-16T03:07:23.31 0.1 undecidable manual P 89 12.876 100 0.24 99
IV.LNSS.HHZ. 2023-07-16T03:07:22.97 0.1 undecidable manual P 353 10.6782 116 0.22 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.LNSS.HHE. ML:0.9 0.00008325 0.12 AML other m 2023-07-16T03:07:25.02
IV.LNSS.HHN. ML:0.8 0.00006560000000000001 0.96 AML other m 2023-07-16T03:07:25.95
IV.ARRO.EHE. ML:0.2 0.000009934999999999999 0.26 AML other m 2023-07-16T03:07:29.79
IV.ARRO.EHN. ML:0.2 0.000008229999999999999 0.78 AML other m 2023-07-16T03:07:30.10
IV.NRCA.HHE. ML:0.6 0.000013700000000000001 0.1 AML other m 2023-07-16T03:07:32.15
IV.NRCA.HHN. ML:0.4 0.000012309999999999999 0.1 AML other m 2023-07-16T03:07:32.61
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