Earthquake with magnitude of ML 1.2 on date 14-09-2021 and time 21:42:01 (Italy) in region 6 km NW Cittareale (RI)

A magnitude ML 1.2 earthquake occured in region: 6 km NW Cittareale (RI), on

  • 14-09-2021 19:42:01 (UTC)
  • 14-09-2021 21:42:01 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.666, 13.127 at 9 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
Cittareale RI 6 482 482
Accumoli RI 11 667 1149
Cascia PG 11 3217 4366
Amatrice RI 14 2657 7023
Monteleone di Spoleto PG 14 599 7622
Norcia PG 15 4957 12579
Posta RI 16 694 13273
Poggiodomo PG 17 117 13390
Borbona RI 17 617 14007
Leonessa RI 18 2435 16442
Arquata del Tronto AP 18 1178 17620
Montereale AQ 18 2581 20201

Municipalities with at least 50000 inhabitants

An earthquake occurred to
41 Km E of Terni (111501 inhabitants)
41 Km NW of L'Aquila (69753 inhabitants)
47 Km W of Teramo (54892 inhabitants)
47 Km SE of Foligno (57155 inhabitants)
78 Km SE of Perugia (166134 inhabitants)
81 Km NE of Guidonia Montecelio (88673 inhabitants)
83 Km NE of Tivoli (56533 inhabitants)
85 Km W of Montesilvano (53738 inhabitants)
88 Km E of Viterbo (67173 inhabitants)
92 Km W of Pescara (121014 inhabitants)
92 Km W of Chieti (51815 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 1.2 2021-09-14
19:42:01
42.6655 13.1267 9 2021-09-14
20:11:36
Sala Sismica INGV-Roma 95433011
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-09-14 19:42:01 ± 0.1
Latitude 42.6655 ± 0.0081
Longitude 13.1267 ± 0.0073
Depth (km) 9 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 95433011

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 903
Semi-minor axis of confidence ellipse (meter) 545
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 199
Circular confidence region, given by single value of horizontal uncertainty (meter) 900
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 77
Number of associated phases, regardless of their use for origin computation 14
Number of defining phases 14
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.28
Epicentral distance of station closest to the epicenter (degree) 0.08903
Epicentral distance of station farthest from the epicenter (degree) 0.50902
Number of stations at which the event was observed 9
Number of stations from which data was used for origin computation 9
Magnitude information

ML:1.2

Field Value
Value 1.2
Uncertainty 0.3
Num. used stations 14
Type of magnitude ML
Reference to an origin 95433011
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-09-14 20:11:36
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.ASSB.HHZ. 2021-09-14T19:42:20.76 0.1 undecidable manual P 0.509 8.81 0
IV.CSP1.EHZ. 2021-09-14T19:42:17.51 0.3 undecidable manual S 8 0.4299 50 0.34 68
IV.CSP1.EHZ. 2021-09-14T19:42:10.43 0.1 undecidable manual P 8 0.4299 50 -0.16 94
IV.MF5.EHZ. 2021-09-14T19:42:10.43 0.1 undecidable manual P 37 0.4038 50 0.28 92
IV.FDMO.HHZ. 2021-09-14T19:42:09.27 0.1 undecidable manual P 356 0.3714 50 -0.32 92
IV.GAVE.EHZ. 2021-09-14T19:42:08.56 0.3 undecidable manual S 279 0.1727 116 -0.44 70
IV.RM33.EHZ. 2021-09-14T19:42:08.67 0.3 undecidable manual S 158 0.1691 116 -0.2 73
IV.SMA1.EHZ. 2021-09-14T19:42:08.60 0.3 undecidable manual S 103 0.1574 118 0.13 75
IV.GAVE.EHZ. 2021-09-14T19:42:06.04 0.1 undecidable manual P 279 0.1727 116 0.17 98
IV.LNSS.HHZ. 2021-09-14T19:42:06.74 0.3 undecidable manual S 225 0.089 133 0.42 71
IV.SMA1.EHZ. 2021-09-14T19:42:05.46 0.1 undecidable manual P 103 0.1574 118 -0.1 100
IV.RM33.EHZ. 2021-09-14T19:42:05.57 0.1 undecidable manual P 158 0.1691 116 -0.23 97
IV.NRCA.HHZ. 2021-09-14T19:42:05.69 0.1 undecidable manual P 357 0.1682 117 -0.09 100
IV.LNSS.HHZ. 2021-09-14T19:42:04.55 0.1 undecidable manual P 225 0.089 133 0.22 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.LNSS.HHE. ML:1.6 0.000522 0.62 AML other m 2021-09-14T19:42:07.45
IV.LNSS.HHN. ML:1.7 0.0006115 0.3 AML other m 2021-09-14T19:42:08.32
IV.SMA1.EHE. ML:1.4 0.000198 1.28 AML other m 2021-09-14T19:42:09.32
IV.NRCA.HHN. ML:1.2 0.000133 0.1 AML other m 2021-09-14T19:42:09.91
IV.RM33.EHN. ML:1 8.635E-5 1.34 AML other m 2021-09-14T19:42:10.93
IV.NRCA.HHE. ML:1.3 0.000157 0.44 AML other m 2021-09-14T19:42:10.57
IV.GAVE.EHN. ML:1.5 0.000228 0.52 AML other m 2021-09-14T19:42:11.42
IV.GAVE.EHE. ML:1.3 0.000164 1.1 AML other m 2021-09-14T19:42:11.94
IV.SMA1.EHN. ML:1.3 0.000154 1.26 AML other m 2021-09-14T19:42:11.71
IV.RM33.EHE. ML:1 8.655E-5 0.52 AML other m 2021-09-14T19:42:13.73
IV.FDMO.HHE. ML:0.9 2.585E-5 0.9 AML other m 2021-09-14T19:42:16.20
IV.FDMO.HHN. ML:0.8 2.175E-5 1.08 AML other m 2021-09-14T19:42:19.28
IV.ASSB.HHE. ML:1 1.99E-5 0.6 AML other m 2021-09-14T19:42:22.51
IV.ASSB.HHN. ML:1 2.695E-5 0.92 AML other m 2021-09-14T19:42:24.35
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