Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.9 on date 27-09-2022 and time 18:08:40 (Italy) in region 8 km NW Accumoli (RI)

A magnitude ML 0.9 earthquake occured in region: 8 km NW Accumoli (RI), on

  • 27-09-2022 16:08:40 (UTC)
  • 27-09-2022 18:08:40 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.7420, 13.1730 at 9 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.

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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
Accumoli RI 8 667 667
Norcia PG 9 4957 5624
Arquata del Tronto AP 11 1178 6802
Cascia PG 13 3217 10019
Cittareale RI 14 482 10501
Amatrice RI 16 2657 13158
Castelsantangelo sul Nera MC 17 281 13439
Montegallo AP 17 523 13962
Preci PG 19 724 14686
Acquasanta Terme AP 20 2916 17602
Poggiodomo PG 20 117 17719

Municipalities with at least 50000 inhabitants

An earthquake occurred to
45 Km W of Teramo (54892 inhabitants)
45 Km SE of Foligno (57155 inhabitants)
47 Km NW of L'Aquila (69753 inhabitants)
47 Km E of Terni (111501 inhabitants)
76 Km SE of Perugia (166134 inhabitants)
84 Km W of Montesilvano (53738 inhabitants)
90 Km NE of Guidonia Montecelio (88673 inhabitants)
91 Km W of Pescara (121014 inhabitants)
92 Km NE of Tivoli (56533 inhabitants)
92 Km W of Chieti (51815 inhabitants)
95 Km E of Viterbo (67173 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 0.9 2022-09-27
16:08:40		 42.7422 13.173 9 2024-03-01
15:27:58		 Bollettino Sismico Italiano INGV 111229091
Reviewed
Rev100 		ML 0.8 2022-09-27
16:08:40		 42.7493 13.1708 11 2022-09-27
16:13:34		 Sala Sismica INGV-Roma 110222851
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2022-09-27 16:08:40 ± 0.17
Latitude 42.7422 ± 0.0045
Longitude 13.1730 ± 0.0086
Depth (km) 9 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 111229091

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 707
Semi-minor axis of confidence ellipse (meter) 297
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 92
Circular confidence region, given by single value of horizontal uncertainty (meter) 710.0
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 13
Number of defining phases 13
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) 0.10072
Epicentral distance of station farthest from the epicenter (degree) 0.56387
Number of stations at which the event was observed 7
Number of stations from which data was used for origin computation 7
Magnitudes information

ML:0.9

Field Value
Value 0.9
Uncertainty 0.5
Num. used stations 6
Type of magnitude ML
Reference to an origin 111229091
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2022-10-27 13:32:36

ML:0.8

Field Value
Value 0.8
Uncertainty 0.1
Num. used stations 4
Type of magnitude ML
Reference to an origin 110222851
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2022-09-27 16:13:34
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.FAGN.HHZ. 2022-09-27T16:08:51.97 0.3 undecidable manual P 147 62.5929 50 0.14 67
IV.RM33.HNE. 2022-09-27T16:08:49.59 0.1 undecidable manual S 173 26.0517 109 -0.5 88
IV.LNSS.HHZ. 2022-09-27T16:08:48.08 0.3 undecidable manual S 215 18.87 116 0.3 70
IV.MMO1.EHZ. 2022-09-27T16:08:48.42 0.3 undecidable manual S 36 21.4674 113 -0.17 72
7F.SIB2.EHE. 2022-09-27T16:08:47.94 0.6 undecidable manual S 33 19.6692 115 -0.08 49
IV.SMA1.EHZ. 2022-09-27T16:08:47.84 0.1 undecidable manual S 133 18.1707 117 0.29 94
IV.NRCA.HHZ. 2022-09-27T16:08:45.46 0.1 undecidable manual S 335 11.1777 129 -0.05 100
IV.MMO1.EHZ. 2022-09-27T16:08:45.07 0.3 undecidable manual P 36 21.4674 113 -0.11 73
IV.RM33.HNE. 2022-09-27T16:08:45.58 0.1 undecidable manual P 173 26.0517 109 -0.47 89
IV.LNSS.HHZ. 2022-09-27T16:08:44.80 0.1 undecidable manual P 215 18.87 116 0.1 98
7F.SIB2.EHE. 2022-09-27T16:08:44.89 0.1 undecidable manual P 33 19.6692 115 0.05 99
IV.SMA1.EHZ. 2022-09-27T16:08:44.93 0.1 undecidable manual P 133 18.1707 117 0.36 93
IV.NRCA.HHZ. 2022-09-27T16:08:43.52 0.1 undecidable manual P 335 11.1777 129 0.12 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHN. ML:0.6 0.000054499999999999997 0.4 AML other m 2022-09-27T16:08:45.79
IV.NRCA.HHE. ML:0.8 0.00007645 0.46 AML other m 2022-09-27T16:08:46.66
IV.LNSS.HHE. ML:0.9 0.00006778965500000001 0.1792 AML other m 2022-09-27T16:08:48.24
IV.LNSS.HHN. ML:0.8 0.00004790093 0.128 AML other m 2022-09-27T16:08:48.36
IV.FAGN.HHE. ML:2.2 0.000297 0.06 AML other m 2022-09-27T16:08:56.12
IV.FAGN.HHN. ML:1.8 0.00011905 0.2 AML other m 2022-09-27T16:08:56.26
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