Earthquake with magnitude of ML 1.1 on date 07-09-2021 and time 09:28:26 (Italy) in region 4 km E Amatrice (RI)

A magnitude ML 1.1 earthquake occured in region: 4 km E Amatrice (RI), on

  • 07-09-2021 07:28:26 (UTC)
  • 07-09-2021 09:28:26 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.644, 13.331 at 7 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
Amatrice RI 4 2657 2657
Accumoli RI 9 667 3324
Campotosto AQ 10 542 3866
Capitignano AQ 14 665 4531
Cittareale RI 14 482 5013
Arquata del Tronto AP 15 1178 6191
Cortino TE 15 656 6847
Montereale AQ 15 2581 9428
Acquasanta Terme AP 16 2916 12344
Crognaleto TE 16 1297 13641
Rocca Santa Maria TE 17 537 14178
Valle Castellana TE 17 977 15155
Fano Adriano TE 20 296 15451

Municipalities with at least 50000 inhabitants

An earthquake occurred to
31 Km W of Teramo (54892 inhabitants)
33 Km N of L'Aquila (69753 inhabitants)
57 Km E of Terni (111501 inhabitants)
62 Km SE of Foligno (57155 inhabitants)
69 Km W of Montesilvano (53738 inhabitants)
75 Km W of Pescara (121014 inhabitants)
76 Km W of Chieti (51815 inhabitants)
87 Km NE of Guidonia Montecelio (88673 inhabitants)
87 Km NE of Tivoli (56533 inhabitants)
93 Km SE of Perugia (166134 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 1.1 2021-09-07
07:28:26
42.6437 13.331 7 2021-09-07
07:38:22
Sala Sismica INGV-Roma 95143631
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-09-07 07:28:26 ± 0.15
Latitude 42.6437 ± 0.0081
Longitude 13.3310 ± 0.0049
Depth (km) 7 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 95143631

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 917
Semi-minor axis of confidence ellipse (meter) 214
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 203
Circular confidence region, given by single value of horizontal uncertainty (meter) 920
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 136
Number of associated phases, regardless of their use for origin computation 34
Number of defining phases 8
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.12
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.24731
Number of stations at which the event was observed 29
Number of stations from which data was used for origin computation 4
Magnitude information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.3
Num. used stations 6
Type of magnitude ML
Reference to an origin 95143631
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-09-07 07:38:22
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.ZEN8.EHZ. 2021-09-07T07:30:20.14 3.0 undecidable manual Sg 13.6 0
IV.IACL.HHZ. 2021-09-07T07:30:16.50 3.0 undecidable manual Sg 10.05 0
IV.CAPR.HNZ. 2021-09-07T07:30:14.19 3.0 undecidable manual Sn -0.32 0
IV.CELI.HHZ. 2021-09-07T07:30:05.66 3.0 undecidable manual Sn 2.54 0
IV.VOBA.EHZ. 2021-09-07T07:30:05.66 3.0 undecidable manual Sn -3.12 0
IV.MMN.HHZ. 2021-09-07T07:29:52.80 3.0 undecidable manual Sg 5.1 0
IT.LNT.HGZ. 2021-09-07T07:29:44.81 3.0 undecidable manual Pn 6.54 0
GU.LSD.HHZ. 2021-09-07T07:29:43.97 3.0 undecidable manual Pn 0.38 0
SI.ABSI.HHZ. 2021-09-07T07:29:39.10 3.0 positive manual Pg 7.86 0
IV.HAGA.HHZ. 2021-09-07T07:29:37.87 3.0 undecidable manual Pn -0.83 0
IV.VOBA.EHZ. 2021-09-07T07:29:37.43 3.0 negative manual Pg 15.95 0
IV.QLNO.HHZ. 2021-09-07T07:29:34.80 3.0 undecidable manual Pg 9.17 0
GU.IMI.HHZ. 2021-09-07T07:29:31.32 3.0 undecidable manual Pn 3.73 0
IV.SARZ.HHZ. 2021-09-07T07:29:29.65 3.0 positive manual Pn 4.98 0
IV.NDIM.HNZ. 2021-09-07T07:29:23.45 3.0 undecidable manual Pg 12.63 0
IV.RIBO.EHZ.01 2021-09-07T07:29:23.05 3.0 undecidable manual Sg 4.16 0
IV.OSSC.HHZ. 2021-09-07T07:29:20.19 3.0 undecidable manual Sn -1.81 0
IV.SGTA.HHZ. 2021-09-07T07:29:14.91 3.0 undecidable manual Sn -2.46 0
IV.PE3.EHZ. 2021-09-07T07:29:12.72 3.0 undecidable manual Sg 2.66 0
IV.VBKN.HHZ. 2021-09-07T07:29:11.62 3.0 undecidable manual Sn -1.23 0
GU.POPM.HHZ. 2021-09-07T07:29:04.92 3.0 positive manual Pn 1.51 0
IV.TOLF.HHZ. 2021-09-07T07:28:57.91 3.0 undecidable manual S -2.27 0
IV.CESX.HHZ. 2021-09-07T07:28:46.82 3.0 undecidable manual S -0.33 0
IV.SRES.HHZ. 2021-09-07T07:28:45.56 3.0 undecidable manual S -1.96 0
IV.MNTT.EHZ. 2021-09-07T07:28:44.36 3.0 undecidable manual S -3.09 0
IV.FDMO.HHZ. 2021-09-07T07:28:36.52 3.0 positive manual P 0.16 0
IV.NRCA.HHZ. 2021-09-07T07:28:36.70 0.3 undecidable manual S 320 0.2473 104 0 73
IV.TERO.HHZ. 2021-09-07T07:28:34.94 0.1 undecidable manual S 96 0.2014 107 -0.05 97
IV.NRCA.HHZ. 2021-09-07T07:28:32.55 0.1 undecidable manual P 320 0.2473 104 0.01 97
IV.TERO.HHZ. 2021-09-07T07:28:31.53 0.1 undecidable manual P 96 0.2014 107 -0.03 97
IV.T1299.EHZ. 2021-09-07T07:28:29.47 0.1 undecidable manual S 255 0.0369 149 -0.16 98
IV.SMA1.EHZ. 2021-09-07T07:28:29.36 0.1 undecidable manual S 167 0.0135 168 0.06 100
IV.T1299.EHZ. 2021-09-07T07:28:28.52 0.1 undecidable manual P 255 0.0369 149 0.05 100
IV.SMA1.EHZ. 2021-09-07T07:28:28.44 0.3 undecidable manual P 167 0.0135 168 0.17 73
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SMA1.EHN. ML:0 0.00036401968 0.1216 AML other m 2021-09-07T07:28:29.63
IV.SMA1.EHE. ML:0 0.00084710865 0.2048 AML other m 2021-09-07T07:28:29.47
IV.NRCA.HHN. ML:0.7 2.2548785E-5 0.1408 AML other m 2021-09-07T07:28:37.77
IV.NRCA.HHE. ML:0.9 4.07E-5 0.08 AML other m 2021-09-07T07:28:37.28
IV.TERO.HHE. ML:1.4 0.0001692235 0.5568 AML other m 2021-09-07T07:28:35.82
IV.TERO.HHN. ML:0.8 4.4058745E-5 0.0768 AML other m 2021-09-07T07:28:35.15
IV.NRCA.HNE. ML:1.3 0.0001219329 0.5248 AML other m 2021-09-07T07:28:43.69
IV.NRCA.HNN. ML:1.4 0.000135764965 0.6848 AML other m 2021-09-07T07:28:36.85
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