Earthquake with magnitude of ML 0.8 on date 12-09-2021 and time 18:26:43 (UTC) in region 5 km W Montereale (AQ)

A magnitude ML 0.8 earthquake occured in region: 5 km W Montereale (AQ), on

  • 12-09-2021 18:26:43 (UTC)
  • 12-09-2021 20:26:43 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.538, 13.188 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
Montereale AQ 5 2581 2581
Borbona RI 5 617 3198
Posta RI 8 694 3892
Cagnano Amiterno AQ 9 1369 5261
Cittareale RI 9 482 5743
Capitignano AQ 10 665 6408
Barete AQ 12 737 7145
Amatrice RI 13 2657 9802
Pizzoli AQ 14 4326 14128
Micigliano RI 15 127 14255
Campotosto AQ 15 542 14797
Antrodoco RI 16 2588 17385
Borgo Velino RI 18 972 18357
Accumoli RI 18 667 19024
Leonessa RI 19 2435 21459
Scoppito AQ 19 3727 25186

Municipalities with at least 50000 inhabitants

An earthquake occurred to
27 Km NW of L'Aquila (69753 inhabitants)
44 Km E of Terni (111501 inhabitants)
45 Km W of Teramo (54892 inhabitants)
61 Km SE of Foligno (57155 inhabitants)
71 Km NE of Guidonia Montecelio (88673 inhabitants)
71 Km NE of Tivoli (56533 inhabitants)
79 Km W of Montesilvano (53738 inhabitants)
83 Km W of Chieti (51815 inhabitants)
85 Km W of Pescara (121014 inhabitants)
90 Km E of Viterbo (67173 inhabitants)
91 Km SE of Perugia (166134 inhabitants)
92 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 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 0.8 2021-09-12
18:26:43
42.5382 13.1878 11 2021-09-12
18:36:29
Sala Sismica INGV-Roma 95358461
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-09-12 18:26:43 ± 0.07
Latitude 42.5382 ± 0.0045
Longitude 13.1878 ± 0.0049
Depth (km) 11 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 95358461

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 380
Semi-minor axis of confidence ellipse (meter) 277
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 9
Circular confidence region, given by single value of horizontal uncertainty (meter) 380
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 110
Number of associated phases, regardless of their use for origin computation 20
Number of defining phases 19
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.2
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.31746
Number of stations at which the event was observed 11
Number of stations from which data was used for origin computation 10
Magnitude information

ML:0.8

Field Value
Value 0.8
Uncertainty 0.1
Num. used stations 9
Type of magnitude ML
Reference to an origin 95358461
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-09-12 18:36:29
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.TERO.HNE. 2021-09-12T18:26:55.14 0.1 undecidable manual S 74 0.3175 50 -0.26 94
IV.FIAM.HHE. 2021-09-12T18:26:54.04 0.6 undecidable manual S 191 0.2752 50 -0.09 49
IV.GIGS.HHE. 2021-09-12T18:26:54.51 0.1 undecidable manual S 107 0.2959 50 -0.25 95
IV.NRCA.HHZ. 2021-09-12T18:26:54.72 0.1 undecidable manual S 350 0.3004 50 -0.16 95
IV.GAVE.EHE. 2021-09-12T18:26:53.66 0.1 undecidable manual S 306 0.2653 50 -0.19 94
IV.MTRA.EHZ. 2021-09-12T18:26:53.65 0.1 undecidable manual S 35 0.2671 50 -0.25 95
IV.NRCA.HHZ. 2021-09-12T18:26:50.05 0.1 undecidable manual P 350 0.3004 50 -0.02 98
IV.SMA1.EHZ. 2021-09-12T18:26:50.39 0.1 undecidable manual S 50 0.1421 125 0.23 96
IV.ARRO.EHZ. 2021-09-12T18:26:50.35 3.0 undecidable manual P 0 0
IV.TERO.HNE. 2021-09-12T18:26:50.33 0.1 undecidable manual P 74 0.3175 50 -0.04 97
IV.MTRA.EHZ. 2021-09-12T18:26:49.48 0.1 undecidable manual P 35 0.2671 50 -0.02 99
IV.FIAM.HHE. 2021-09-12T18:26:49.70 0.3 undecidable manual P 191 0.2752 50 0.07 72
IV.GIGS.HHE. 2021-09-12T18:26:49.93 0.3 undecidable manual P 107 0.2959 50 -0.07 73
IV.LNSS.HHZ. 2021-09-12T18:26:49.64 0.1 undecidable manual S 301 0.1268 128 -0.02 99
IV.GAVE.EHE. 2021-09-12T18:26:49.47 0.3 undecidable manual P 306 0.2653 50 0 74
IV.LNSS.HHZ. 2021-09-12T18:26:47.23 0.1 undecidable manual P 301 0.1268 128 0.17 99
IV.RM33.EHZ. 2021-09-12T18:26:47.28 0.1 undecidable manual S 146 0.0351 160 -0.23 97
IV.SMA1.EHZ. 2021-09-12T18:26:47.72 0.3 positive manual P 50 0.1421 125 0.38 70
IV.T1299.EHE. 2021-09-12T18:26:47.24 0.1 undecidable manual P 36 0.1187 130 0.33 95
IV.RM33.EHZ. 2021-09-12T18:26:46.00 0.1 undecidable manual P 146 0.0351 160 0.19 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.LNSS.HHE. ML:0.9 8.055E-5 1 AML other m 2021-09-12T18:26:49.70
IV.LNSS.HHN. ML:0.9 8.161624E-5 0.1536 AML other m 2021-09-12T18:26:49.71
IV.SMA1.EHE. ML:0.9 6.63E-5 0.16 AML other m 2021-09-12T18:26:50.76
IV.SMA1.EHN. ML:0.7 4.63E-5 1.5 AML other m 2021-09-12T18:26:50.14
IV.NRCA.HHE. ML:0.8 3.1E-5 0.1 AML other m 2021-09-12T18:26:55.37
IV.NRCA.HHN. ML:0.7 2.055E-5 0.14 AML other m 2021-09-12T18:26:56.42
IV.LNSS.HNE. ML:1 0.000102285925 0.2176 AML other m 2021-09-12T18:26:49.69
IV.ARRO.EHE. ML:0.6 1.44040825E-5 0.2048 AML other m 2021-09-12T18:26:55.44
IV.ARRO.EHN. ML:0.7 1.8239325E-5 0.2048 AML other m 2021-09-12T18:26:58.80
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