Earthquake with magnitude of ML 1.0 on date 13-09-2021 and time 03:25:26 (Italy) in region 3 km SE Amatrice (RI)

A magnitude ML 1.0 earthquake occured in region: 3 km SE Amatrice (RI), on

  • 13-09-2021 01:25:26 (UTC)
  • 13-09-2021 03:25:26 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.601, 13.302 at 13 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 3 2657 2657
Campotosto AQ 7 542 3199
Capitignano AQ 9 665 3864
Montereale AQ 10 2581 6445
Accumoli RI 11 667 7112
Cittareale RI 12 482 7594
Crognaleto TE 16 1297 8891
Barete AQ 17 737 9628
Cagnano Amiterno AQ 17 1369 10997
Borbona RI 17 617 11614
Cortino TE 17 656 12270
Pizzoli AQ 18 4326 16596
Posta RI 19 694 17290
Arquata del Tronto AP 19 1178 18468

Municipalities with at least 50000 inhabitants

An earthquake occurred to
29 Km N of L'Aquila (69753 inhabitants)
34 Km W of Teramo (54892 inhabitants)
54 Km E of Terni (111501 inhabitants)
63 Km SE of Foligno (57155 inhabitants)
70 Km W of Montesilvano (53738 inhabitants)
76 Km W of Pescara (121014 inhabitants)
76 Km W of Chieti (51815 inhabitants)
82 Km NE of Guidonia Montecelio (88673 inhabitants)
82 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 1.0 2021-09-13
01:25:26
42.6008 13.3017 13 2021-09-13
01:32:00
Sala Sismica INGV-Roma 95364221
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-09-13 01:25:26 ± 0.15
Latitude 42.6008 ± 0.0063
Longitude 13.3017 ± 0.0122
Depth (km) 13 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 95364221

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 826
Semi-minor axis of confidence ellipse (meter) 797
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 128
Circular confidence region, given by single value of horizontal uncertainty (meter) 830
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 149
Number of associated phases, regardless of their use for origin computation 10
Number of defining phases 10
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.19
Epicentral distance of station closest to the epicenter (degree) 0.03867
Epicentral distance of station farthest from the epicenter (degree) 0.29857
Number of stations at which the event was observed 5
Number of stations from which data was used for origin computation 5
Magnitude information

ML:1

Field Value
Value 1
Uncertainty 0.2
Num. used stations 4
Type of magnitude ML
Reference to an origin 95364221
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-09-13 01:32:00
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.MMO1.EHZ. 2021-09-13T01:25:37.95 0.6 undecidable manual S 4 0.2986 95 -0.03 49
IV.TERO.HHZ. 2021-09-13T01:25:35.66 0.3 undecidable manual S 84 0.223 98 -0.1 75
IV.MMO1.EHZ. 2021-09-13T01:25:33.24 0.1 undecidable manual P 4 0.2986 95 0.05 99
IV.MTRA.EHZ. 2021-09-13T01:25:33.91 0.3 undecidable manual S 24 0.1709 104 -0.31 72
IV.TERO.HHZ. 2021-09-13T01:25:32.20 1.0 undecidable manual P 84 0.223 98 0.29 24
IV.RM33.EHZ. 2021-09-13T01:25:32.28 0.6 undecidable manual S 215 0.1124 121 -0.33 48
IV.MTRA.EHZ. 2021-09-13T01:25:31.10 0.1 undecidable manual P 24 0.1709 104 0.08 100
IV.SMA1.EHZ. 2021-09-13T01:25:31.25 0.6 undecidable manual S 40 0.0387 156 0.09 51
IV.RM33.EHZ. 2021-09-13T01:25:30.12 0.3 undecidable manual P 215 0.1124 121 0.03 77
IV.SMA1.EHZ. 2021-09-13T01:25:29.53 0.3 positive manual P 40 0.0387 156 0.28 74
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SMA1.EHN. ML:0.9 0.0001125 0.34 AML other m 2021-09-13T01:25:31.49
IV.SMA1.EHE. ML:1.3 0.000296 0.42 AML other m 2021-09-13T01:25:31.53
IV.RM33.EHE. ML:1 9.88E-5 0.3 AML other m 2021-09-13T01:25:32.46
IV.RM33.EHN. ML:0.8 5.825E-5 0.9 AML other m 2021-09-13T01:25:33.02
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