Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.9 on date 21-09-2024 and time 04:16:21 (Italy) in region 2 km E Cerreto di Spoleto (PG)

A magnitude ML 0.9 earthquake occured in region: 2 km E Cerreto di Spoleto (PG), on

  • 21-09-2024 02:16:21 (UTC)
  • 21-09-2024 04:16:21 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.8260, 12.9440 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
Cerreto di Spoleto PG 2 1075 1075
Sellano PG 7 1079 2154
Vallo di Nera PG 9 364 2518
Preci PG 10 724 3242
Poggiodomo PG 13 117 3359
Norcia PG 13 4957 8316
Cascia PG 13 3217 11533
Sant'Anatolia di Narco PG 14 564 12097
Campello sul Clitunno PG 14 2442 14539
Scheggino PG 16 461 15000
Visso MC 17 1107 16107
Trevi PG 17 8469 24576
Castelsantangelo sul Nera MC 19 281 24857
Monte Cavallo MC 19 145 25002
Monteleone di Spoleto PG 19 599 25601
Spoleto PG 20 38218 63819

Municipalities with at least 50000 inhabitants

An earthquake occurred to
24 Km SE of Foligno (57155 inhabitants)
38 Km NE of Terni (111501 inhabitants)
55 Km SE of Perugia (166134 inhabitants)
65 Km NW of L'Aquila (69753 inhabitants)
65 Km W of Teramo (54892 inhabitants)
82 Km NE of Viterbo (67173 inhabitants)
94 Km N of Guidonia Montecelio (88673 inhabitants)
97 Km N of Tivoli (56533 inhabitants)
100 Km SW of Ancona (100861 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 2024-09-21
02:16:21		 42.8265 12.9435 11 2024-09-21
02:39:36		 Sala Sismica INGV-Roma 131592401
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2024-09-21 02:16:21 ± 0.06
Latitude 42.8265 ± 0.0018
Longitude 12.9435 ± 0.0037
Depth (km) 11 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 131592401

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 265
Semi-minor axis of confidence ellipse (meter) 251
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 72
Circular confidence region, given by single value of horizontal uncertainty (meter) 260.0
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 15
Number of defining phases 14
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.1
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.32645
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 0.1
Num. used stations 6
Type of magnitude ML
Reference to an origin 131592401
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2024-09-21 02:39:36
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.SSFR.HHZ. 2024-09-21T02:16:43.94 3.0 undecidable manual S -0.03 0
IV.CSP1.EHZ. 2024-09-21T02:16:34.23 0.6 undecidable manual S 36 36.2415 50 0.26 63
IV.ASSB.HHZ. 2024-09-21T02:16:33.00 0.6 undecidable manual S 316 33.3444 50 -0.18 64
IV.ARRO.EHZ. 2024-09-21T02:16:32.63 0.6 undecidable manual S 208 31.0467 50 0.06 66
IV.MML1.EHZ. 2024-09-21T02:16:32.84 0.6 undecidable manual S 4 31.9458 50 0.03 66
IV.MMO1.EHZ. 2024-09-21T02:16:32.82 0.6 undecidable manual S 75 32.2455 50 -0.06 66
IV.LNSS.HHZ. 2024-09-21T02:16:31.11 0.6 undecidable manual S 162 26.0517 50 -0.13 66
IV.CESI.HHZ. 2024-09-21T02:16:29.50 0.6 undecidable manual S 351 20.0688 118 -0.12 66
IV.ASSB.HHZ. 2024-09-21T02:16:28.36 0.6 undecidable manual P 316 33.3444 50 0.02 66
IV.CSP1.EHZ. 2024-09-21T02:16:28.73 0.6 positive manual P 36 36.2415 50 -0.07 65
IV.MMO1.EHZ. 2024-09-21T02:16:28.02 0.6 positive manual P 75 32.2455 50 -0.15 65
IV.ARRO.EHZ. 2024-09-21T02:16:28.14 0.6 negative manual P 208 31.0467 50 0.15 65
IV.MML1.EHZ. 2024-09-21T02:16:28.17 1.0 undecidable manual P 4 31.9458 50 0.04 33
IV.LNSS.HHZ. 2024-09-21T02:16:27.27 1.0 positive manual P 162 26.0517 50 0.05 33
IV.CESI.HHZ. 2024-09-21T02:16:26.39 0.3 undecidable manual P 351 20.0688 118 0.1 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CESI.HHN. ML:0.9 0.0000582 0.5 AML other m 2024-09-21T02:16:29.84
IV.CESI.HHE. ML:0.9 0.000059999999999999995 0.44 AML other m 2024-09-21T02:16:29.86
IV.LNSS.HHE. ML:0.9 0.00004185 0.12 AML other m 2024-09-21T02:16:32.09
IV.LNSS.HHN. ML:0.8 0.00003715 0.48 AML other m 2024-09-21T02:16:32.43
IV.MML1.EHE. ML:0.9 0.00003705 0.16 AML other m 2024-09-21T02:16:33.13
IV.MML1.EHN. ML:1.0 0.00003835 0.6 AML other m 2024-09-21T02:16:34.00
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