Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.9 on date 26-05-2023 and time 01:48:39 (UTC) in region 5 km NW Ferentillo (TR)

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

  • 26-05-2023 01:48:39 (UTC)
  • 26-05-2023 03:48:39 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.6510, 12.7500 at 15 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
Ferentillo TR 5 1913 1913
Montefranco TR 6 1276 3189
Arrone TR 8 2763 5952
Spoleto PG 9 38218 44170
Scheggino PG 10 461 44631
Polino TR 11 233 44864
Sant'Anatolia di Narco PG 12 564 45428
Terni TR 13 111501 156929
Labro RI 15 374 157303
Morro Reatino RI 15 373 157676
Vallo di Nera PG 16 364 158040
Poggiodomo PG 17 117 158157
Monteleone di Spoleto PG 17 599 158756
Colli sul Velino RI 17 533 159289
San Gemini TR 17 5018 164307
Acquasparta TR 17 4778 169085
Rivodutri RI 17 1253 170338
Stroncone TR 18 4917 175255
Campello sul Clitunno PG 19 2442 177697
Poggio Bustone RI 20 2055 179752

Municipalities with at least 50000 inhabitants

An earthquake occurred to
13 Km NE of Terni (111501 inhabitants)
34 Km S of Foligno (57155 inhabitants)
59 Km SE of Perugia (166134 inhabitants)
59 Km E of Viterbo (67173 inhabitants)
63 Km NW of L'Aquila (69753 inhabitants)
72 Km N of Guidonia Montecelio (88673 inhabitants)
77 Km N of Tivoli (56533 inhabitants)
78 Km W of Teramo (54892 inhabitants)
87 Km N of Roma (2864731 inhabitants)
100 Km NE of Civitavecchia (52991 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 2023-05-26
01:48:39		 42.6513 12.75 15 2023-05-26
01:55:59		 Sala Sismica INGV-Roma 117731441
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-05-26 01:48:39 ± 0.08
Latitude 42.6513 ± 0.0036
Longitude 12.7500 ± 0.0024
Depth (km) 15 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 117731441

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 361
Semi-minor axis of confidence ellipse (meter) 287
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 176
Circular confidence region, given by single value of horizontal uncertainty (meter) 360.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 148
Number of associated phases, regardless of their use for origin computation 12
Number of defining phases 12
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.08
Epicentral distance of station closest to the epicenter (degree) 0.07285
Epicentral distance of station farthest from the epicenter (degree) 0.37142
Number of stations at which the event was observed 6
Number of stations from which data was used for origin computation 6
Magnitude information

ML:0.9

Field Value
Value 0.9
Uncertainty 0.3
Num. used stations 8
Type of magnitude ML
Reference to an origin 117731441
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-05-26 01:55:59
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CESI.HHZ. 2023-05-26T01:48:53.47 0.6 undecidable manual S 18 41.2254 99 -0.01 49
IV.NRCA.HHZ. 2023-05-26T01:48:52.04 0.6 undecidable manual S 56 35.9418 100 -0.05 49
IV.LNSS.HHZ. 2023-05-26T01:48:49.07 0.6 undecidable manual S 103 24.2535 109 -0.02 50
IV.MOMA.HHN. 2023-05-26T01:48:48.60 0.6 undecidable manual S 319 22.3554 111 -0.01 51
IV.NRCA.HHZ. 2023-05-26T01:48:47.10 0.3 undecidable manual P 56 35.9418 100 0.14 73
IV.CESI.HHZ. 2023-05-26T01:48:47.70 0.1 positive manual P 18 41.2254 99 -0.06 96
IV.GAVE.EHZ. 2023-05-26T01:48:46.45 0.6 undecidable manual S 69 12.5763 132 0.09 50
IV.LNSS.HHZ. 2023-05-26T01:48:45.20 0.1 undecidable manual P 103 24.2535 109 -0.02 100
IV.ARRO.EHZ. 2023-05-26T01:48:45.41 0.6 undecidable manual S 171 8.0808 146 -0.16 51
IV.MOMA.HHN. 2023-05-26T01:48:44.90 0.1 undecidable manual P 319 22.3554 111 -0.05 100
IV.GAVE.EHZ. 2023-05-26T01:48:43.79 0.6 undecidable manual P 69 12.5763 132 0.14 50
IV.ARRO.EHZ. 2023-05-26T01:48:43.28 0.6 undecidable manual P 171 8.0808 146 0.09 51
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ARRO.EHE. ML:0.7 0.000052699999999999993 0.18 AML other m 2023-05-26T01:48:45.65
IV.ARRO.EHN. ML:0.5 0.00003225 0.18 AML other m 2023-05-26T01:48:46.13
IV.GAVE.EHN. ML:1.4 0.000222 0.16 AML other m 2023-05-26T01:48:46.84
IV.GAVE.EHE. ML:1.4 0.00021 1.38 AML other m 2023-05-26T01:48:46.79
IV.LNSS.HHN. ML:0.9 0.00004425 0.42 AML other m 2023-05-26T01:48:49.70
IV.LNSS.HHE. ML:0.8 0.0000339 0.56 AML other m 2023-05-26T01:48:50.20
IV.NRCA.HHN. ML:0.9 0.000030399999999999997 0.16 AML other m 2023-05-26T01:48:52.63
IV.NRCA.HHE. ML:1.0 0.00003675 0.14 AML other m 2023-05-26T01:48:53.11
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