Earthquake with magnitude of ML 1.1 on date 24-09-2021 and time 20:12:47 (UTC) in region 2 km SW Cittareale (RI)

A magnitude ML 1.1 earthquake occured in region: 2 km SW Cittareale (RI), on

  • 24-09-2021 20:12:47 (UTC)
  • 24-09-2021 22:12:47 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.604, 13.149 at 12 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 2 482 482
Posta RI 10 694 1176
Borbona RI 10 617 1793
Amatrice RI 12 2657 4450
Montereale AQ 12 2581 7031
Accumoli RI 13 667 7698
Capitignano AQ 16 665 8363
Leonessa RI 16 2435 10798
Cascia PG 17 3217 14015
Monteleone di Spoleto PG 17 599 14614
Cagnano Amiterno AQ 17 1369 15983
Micigliano RI 19 127 16110
Campotosto AQ 19 542 16652

Municipalities with at least 50000 inhabitants

An earthquake occurred to
35 Km NW of L'Aquila (69753 inhabitants)
41 Km E of Terni (111501 inhabitants)
46 Km W of Teramo (54892 inhabitants)
53 Km SE of Foligno (57155 inhabitants)
76 Km NE of Guidonia Montecelio (88673 inhabitants)
77 Km NE of Tivoli (56533 inhabitants)
83 Km W of Montesilvano (53738 inhabitants)
84 Km SE of Perugia (166134 inhabitants)
88 Km E of Viterbo (67173 inhabitants)
88 Km W of Chieti (51815 inhabitants)
89 Km W of Pescara (121014 inhabitants)
96 Km NE of Roma (2864731 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 earthquake resentment in the area, expressed in terms of intensity on the MCS scale (Mercalli-Cancani-Sieberg). Intensities are determined using data from questionnaires collected on the website http://www.hsit.it. The intensities shown are determined considering all the reports received from each municipality, and are all the more reliable the greater the number of questionnaires. The collected data are subjected to an automatic statistical filter, but are not checked individually. In particular, intensities greater than or equal to the VI degree of the MCS or EMS scale require on-site verification by specialized personnel. The black star is the epicenter of the earthquake that occurred. This map is updated every time citizens fill out new questionnaires. The number of questionnaires processed to obtain this map, the date and time of the last update are shown at the top right.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100
ML 1.1 2021-09-24
20:12:47
42.604 13.1492 12 2021-09-24
20:19:16
Sala Sismica INGV-Roma 95845171
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-09-24 20:12:47 ± 0.1
Latitude 42.6040 ± 0.0045
Longitude 13.1492 ± 0.0037
Depth (km) 12 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 95845171

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 414
Semi-minor axis of confidence ellipse (meter) 375
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 192
Circular confidence region, given by single value of horizontal uncertainty (meter) 410
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 112
Number of associated phases, regardless of their use for origin computation 20
Number of defining phases 11
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.11
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.32286
Number of stations at which the event was observed 15
Number of stations from which data was used for origin computation 6
Magnitude information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.2
Num. used stations 8
Type of magnitude ML
Reference to an origin 95845171
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-09-24 20:19:16
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.FERS.EHZ. 2021-09-24T20:14:25.20 3.0 undecidable manual Sg 10.24 0
IV.CPGN.EHZ. 2021-09-24T20:13:52.77 3.0 undecidable manual Sg 5.28 0
IV.ORI.HHZ. 2021-09-24T20:13:44.65 3.0 undecidable manual Sg 0.63 0
IV.ZCCA.HHZ. 2021-09-24T20:13:28.00 3.0 negative manual Pn 11.35 0
TV.SF04.EHZ. 2021-09-24T20:13:28.56 3.0 undecidable manual Sn 3.94 0
IV.PIPA.HHZ. 2021-09-24T20:13:17.67 3.0 negative manual Pg 6.51 0
IV.PESA.HHZ. 2021-09-24T20:13:09.54 3.0 undecidable manual Pn -0.61 0
IV.SPS2.HHZ. 2021-09-24T20:13:06.32 3.0 undecidable manual Pn -0.8 0
IV.MMO1.EHZ. 2021-09-24T20:12:59.84 0.6 undecidable manual S 24 0.3229 93 -0.04 48
IV.GAVE.EHZ. 2021-09-24T20:12:56.30 0.6 undecidable manual S 295 0.2068 98 -0.17 49
IV.ARRO.EHZ. 2021-09-24T20:12:54.14 1.0 positive manual P 265 0.2833 94 0.02 25
IV.SMA1.EHZ. 2021-09-24T20:12:54.48 0.6 undecidable manual S 79 0.1394 109 -0.04 50
IV.MMO1.EHZ. 2021-09-24T20:12:54.68 1.0 negative manual P 24 0.3229 93 -0.12 24
IV.RM33.EHZ. 2021-09-24T20:12:53.40 0.6 undecidable manual S 153 0.1061 121 -0.23 49
IV.GAVE.EHZ. 2021-09-24T20:12:52.83 0.6 positive manual P 295 0.2068 98 0 50
IV.LNSS.HHZ. 2021-09-24T20:12:52.91 0.6 undecidable manual S 269 0.08 133 -0.1 51
IX.SCL3.EHZ.02 2021-09-24T20:12:51.55 3.0 negative manual Pn -4.32 0
IV.SMA1.EHZ. 2021-09-24T20:12:51.86 0.3 positive manual P 79 0.1394 109 0.16 74
IV.RM33.EHZ. 2021-09-24T20:12:51.22 1.0 undecidable manual P 153 0.1061 121 0.03 25
IV.LNSS.HHZ. 2021-09-24T20:12:50.97 0.1 negative manual P 269 0.08 133 0.14 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.LNSS.HHE. ML:1.5 0.000369 0.14 AML other m 2021-09-24T20:12:53.16
IV.LNSS.HHN. ML:1.2 0.000184 0.44 AML other m 2021-09-24T20:12:53.69
IV.RM33.EHN. ML:1 9.31E-5 0.26 AML other m 2021-09-24T20:12:53.50
IV.RM33.EHE. ML:1 0.0001145 0.56 AML other m 2021-09-24T20:12:53.65
IV.SMA1.EHN. ML:1 9.3E-5 0.3 AML other m 2021-09-24T20:12:54.78
IV.SMA1.EHE. ML:1.2 0.00012015 0.3 AML other m 2021-09-24T20:12:54.91
IV.GAVE.EHN. ML:0.8 3.3E-5 0.62 AML other m 2021-09-24T20:12:56.49
IV.GAVE.EHE. ML:0.9 5.03E-5 0.16 AML other m 2021-09-24T20:12:56.74
IX.SCL3.EHN.02 ML:2.8 9.26E-5 0.08 AML other m 2021-09-24T20:13:30.34
IX.SCL3.EHE.02 ML:3 0.000118 0.08 AML other m 2021-09-24T20:13:30.80
IV.ORI.HHN. ML:3.4 0.000152 0.08 AML other m 2021-09-24T20:13:45.19
IV.ORI.HHE. ML:3.5 0.000192 0.06 AML other m 2021-09-24T20:13:54.44
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