Earthquake with magnitude of ML 0.6 on date 29-09-2021 and time 04:58:21 (Italy) in region 7 km NW Accumoli (RI)

A magnitude ML 0.6 earthquake occured in region: 7 km NW Accumoli (RI), on

  • 29-09-2021 02:58:21 (UTC)
  • 29-09-2021 04:58:21 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.748, 13.204 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.

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 7 667 667
Arquata del Tronto AP 8 1178 1845
Norcia PG 10 4957 6802
Cittareale RI 15 482 7284
Amatrice RI 15 2657 9941
Montegallo AP 15 523 10464
Cascia PG 16 3217 13681
Castelsantangelo sul Nera MC 17 281 13962
Acquasanta Terme AP 17 2916 16878
Montemonaco AP 20 604 17482
Preci PG 20 724 18206

Municipalities with at least 50000 inhabitants

An earthquake occurred to
42 Km W of Teramo (54892 inhabitants)
47 Km NW of L'Aquila (69753 inhabitants)
47 Km SE of Foligno (57155 inhabitants)
50 Km E of Terni (111501 inhabitants)
78 Km SE of Perugia (166134 inhabitants)
82 Km W of Montesilvano (53738 inhabitants)
88 Km W of Pescara (121014 inhabitants)
90 Km W of Chieti (51815 inhabitants)
92 Km NE of Guidonia Montecelio (88673 inhabitants)
93 Km NE of Tivoli (56533 inhabitants)
97 Km E of Viterbo (67173 inhabitants)
100 Km S of Ancona (100861 inhabitants)
Recent and historical seismicity
Seismic hazard
Shakemap
Felt maps
Preliminary map of the earthquake effects from the web questionnaire

Preliminary map of the earthquake effects from the web questionnaire

This map shows the distribution of the effects of the earthquake on the territory in terms of the MCS (Mercalli-Cancani-Sieberg) intensity scale. The intensities are determined using the data provided in the questionnaire (http://www.haisentitoilterremoto.it/) that are analysed using robust statistical techniques since they are not verified individually. Specifically, the assignment of MCS intensities greater or equal the VI degree of the MCS scale require opportune in situ verification by professional experts. The purple start shows the epicenter. This map is prepared every so often that the population fill in new questionnaires. The number of questionnaires used to determine the map and the date and time of the last adjournment are shown in the upper right part of the panel.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100
ML 0.6 2021-09-29
02:58:21
42.7477 13.2042 11 2021-09-29
03:07:09
Sala Sismica INGV-Roma 96013601
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-09-29 02:58:21 ± 0.07
Latitude 42.7477 ± 0.0027
Longitude 13.2042 ± 0.0049
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 96013601

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 342
Semi-minor axis of confidence ellipse (meter) 256
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 303
Circular confidence region, given by single value of horizontal uncertainty (meter) 340
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 80
Number of associated phases, regardless of their use for origin computation 23
Number of defining phases 16
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.13
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.42538
Number of stations at which the event was observed 16
Number of stations from which data was used for origin computation 9
Magnitude information

ML:0.6

Field Value
Value 0.6
Uncertainty 0.4
Num. used stations 8
Type of magnitude ML
Reference to an origin 96013601
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-09-29 03:07:09
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.MCRV.HHZ. 2021-09-29T02:59:38.27 3.0 undecidable manual Sg 6.02 0
IV.VBKN.HHZ. 2021-09-29T02:59:19.95 3.0 undecidable manual Sn -4.29 0
IV.AGLI.HHZ. 2021-09-29T02:59:17.99 3.0 undecidable manual Pn 3.17 0
IV.CDRU.HNZ. 2021-09-29T02:59:05.77 3.0 undecidable manual Pn 0.21 0
IV.APEC.HHZ. 2021-09-29T02:58:56.91 3.0 undecidable manual S 0.03 0
IV.FIR.HHZ. 2021-09-29T02:58:51.92 3.0 undecidable manual Pn -0.14 0
IV.SACS.HHZ. 2021-09-29T02:58:39.02 3.0 undecidable manual P -1.91 0
IV.CSP1.EHZ. 2021-09-29T02:58:34.53 0.6 undecidable manual S 0 0.3444 50 -0.05 49
IV.FDMO.HHZ. 2021-09-29T02:58:33.17 0.6 undecidable manual S 344 0.3013 50 -0.14 48
IV.GAVE.EHN. 2021-09-29T02:58:31.28 0.3 undecidable manual S 256 0.2338 50 -0.04 75
IV.MNTT.EHZ. 2021-09-29T02:58:30.42 1.0 undecidable manual P 42 0.4254 50 -0.19 23
IV.MMO1.EHZ. 2021-09-29T02:58:29.64 0.6 undecidable manual S 31 0.1763 50 0.03 50
IV.LNSS.HNE. 2021-09-29T02:58:29.99 0.6 undecidable manual S 220 0.188 50 0.03 50
IV.CSP1.EHZ. 2021-09-29T02:58:29.36 0.6 positive manual P 0 0.3444 50 0.14 48
IV.FDMO.HHZ. 2021-09-29T02:58:28.45 0.6 undecidable manual P 344 0.3013 50 -0.03 49
IV.SMA1.EHZ. 2021-09-29T02:58:28.85 0.6 undecidable manual S 140 0.152 123 0 51
IV.TERO.HHZ. 2021-09-29T02:58:28.46 0.6 undecidable manual P 113 0.3193 50 -0.33 46
IV.GAVE.EHN. 2021-09-29T02:58:27.48 0.1 undecidable manual P 256 0.2338 50 0.14 97
IV.NRCA.HHZ. 2021-09-29T02:58:27.26 0.6 undecidable manual S 323 0.1079 132 -0.27 48
IV.LNSS.HNE. 2021-09-29T02:58:26.43 0.1 undecidable manual P 220 0.188 50 -0.12 99
IV.SMA1.EHZ. 2021-09-29T02:58:26.27 1.0 negative manual P 140 0.152 123 0.36 24
IV.MMO1.EHZ. 2021-09-29T02:58:26.51 0.3 negative manual P 31 0.1763 50 0.16 73
IV.NRCA.HHZ. 2021-09-29T02:58:25.29 0.1 positive manual P 323 0.1079 132 0.14 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHE. ML:1.2 0.0001915 0.16 AML other m 2021-09-29T02:58:27.36
IV.NRCA.HHN. ML:0.9 9.03E-5 0.08 AML other m 2021-09-29T02:58:27.86
IV.SMA1.EHE. ML:0.4 2.143381E-5 0.16 AML other m 2021-09-29T02:58:29.22
IV.SMA1.EHN. ML:0.2 1.5533085E-5 0.32 AML other m 2021-09-29T02:58:29.82
IV.FDMO.HHE. ML:0.1 6.380282E-6 0.1792 AML other m 2021-09-29T02:58:33.83
IV.FDMO.HHN. ML:0.1 7.2004895E-6 0.2 AML other m 2021-09-29T02:58:33.32
IV.CSP1.EHE. ML:0.8 2.624637E-5 2.08 AML other m 2021-09-29T02:58:35.25
IV.CSP1.EHN. ML:1.1 4.432638E-5 4.0208 AML other m 2021-09-29T02:58:34.45
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