Earthquake with magnitude of ML 1.0 on date 31-08-2021 and time 07:51:46 (UTC) in region 3 km SW Montereale (AQ)

A magnitude ML 1.0 earthquake occured in region: 3 km SW Montereale (AQ), on

  • 31-08-2021 07:51:46 (UTC)
  • 31-08-2021 09:51:46 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.506, 13.219 at 14 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 3 2581 2581
Cagnano Amiterno AQ 5 1369 3950
Capitignano AQ 7 665 4615
Borbona RI 7 617 5232
Barete AQ 8 737 5969
Pizzoli AQ 10 4326 10295
Posta RI 10 694 10989
Cittareale RI 13 482 11471
Campotosto AQ 14 542 12013
Micigliano RI 15 127 12140
Antrodoco RI 15 2588 14728
Amatrice RI 15 2657 17385
Scoppito AQ 15 3727 21112
Borgo Velino RI 17 972 22084
Castel Sant'Angelo RI 20 1308 23392

Municipalities with at least 50000 inhabitants

An earthquake occurred to
23 Km NW of L'Aquila (69753 inhabitants)
43 Km W of Teramo (54892 inhabitants)
47 Km E of Terni (111501 inhabitants)
65 Km SE of Foligno (57155 inhabitants)
69 Km NE of Guidonia Montecelio (88673 inhabitants)
69 Km NE of Tivoli (56533 inhabitants)
76 Km W of Montesilvano (53738 inhabitants)
80 Km W of Chieti (51815 inhabitants)
82 Km W of Pescara (121014 inhabitants)
91 Km NE of Roma (2864731 inhabitants)
92 Km E of Viterbo (67173 inhabitants)
95 Km SE of Perugia (166134 inhabitants)
98 Km NE of Velletri (53303 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 2021-08-31
07:51:46
42.5062 13.219 14 2021-08-31
07:59:50
Sala Sismica INGV-Roma 94857191
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-08-31 07:51:46 ± 0.16
Latitude 42.5062 ± 0.0126
Longitude 13.2190 ± 0.0073
Depth (km) 14 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 94857191

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1459
Semi-minor axis of confidence ellipse (meter) 146
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 190
Circular confidence region, given by single value of horizontal uncertainty (meter) 1460
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 228
Number of associated phases, regardless of their use for origin computation 38
Number of defining phases 12
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.26
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.30667
Number of stations at which the event was observed 32
Number of stations from which data was used for origin computation 6
Magnitude information

ML:1

Field Value
Value 1
Uncertainty 0.1
Num. used stations 8
Type of magnitude ML
Reference to an origin 94857191
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-08-31 07:59:50
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.APPI.EHZ. 2021-08-31T07:53:35.59 3.0 undecidable manual Sn -0.59 0
IV.ZEN8.EHZ. 2021-08-31T07:53:23.21 3.0 undecidable manual Sn -0.35 0
IV.SERS.HHZ. 2021-08-31T07:53:18.96 3.0 undecidable manual Sn -0.2 0
IV.SENA.HHZ. 2021-08-31T07:53:16.69 3.0 undecidable manual Sn -5.87 0
IV.CPTP.HHZ. 2021-08-31T07:53:02.75 3.0 undecidable manual Pg 12.98 0
IV.EVRN.HHZ. 2021-08-31T07:53:01.85 3.0 positive manual Pg 15.07 0
GU.LSD.HHZ. 2021-08-31T07:53:01.17 3.0 positive manual Pn -1.33 0
CR.STON.BHZ. 2021-08-31T07:53:00.10 3.0 undecidable manual Sg 10.36 0
IV.HCRL.HHZ. 2021-08-31T07:52:56.90 3.0 positive manual Pn 4.78 0
CH.MUGIO.HHZ. 2021-08-31T07:52:52.00 3.0 undecidable manual Pn 0.89 0
IV.TREG.EHZ. 2021-08-31T07:52:48.89 3.0 undecidable manual Pg 15.53 0
IX.PGN3.HHZ.02 2021-08-31T07:52:48.53 3.0 undecidable manual Sg 10.13 0
IV.HAGA.HHZ. 2021-08-31T07:52:45.30 3.0 positive manual Pn -6.98 0
IV.FIR.HHZ. 2021-08-31T07:52:44.86 3.0 undecidable manual Sn -0.91 0
IV.IFIL.HHZ. 2021-08-31T07:52:42.11 3.0 undecidable manual Pg 7.98 0
IV.MBFT.HHZ. 2021-08-31T07:52:38.56 3.0 negative manual Pn -5.07 0
IV.SELL.HHZ. 2021-08-31T07:52:36.61 3.0 positive manual Pn 1.65 0
GU.POPM.HHZ. 2021-08-31T07:52:29.69 3.0 undecidable manual Pg 7.64 0
IT.MTCL.HGZ. 2021-08-31T07:52:11.74 3.0 undecidable manual Sg 2.39 0
IX.SCL3.EHZ.02 2021-08-31T07:52:10.60 3.0 negative manual Pn 1.89 0
IV.PP3.EHZ. 2021-08-31T07:52:09.00 3.0 undecidable manual Sn -1.03 0
IV.PE3.EHZ. 2021-08-31T07:52:08.81 3.0 positive manual Pg 3.22 0
IV.VBKN.HHZ. 2021-08-31T07:52:05.57 3.0 positive manual Pn 2.49 0
IV.GAVE.EHZ. 2021-08-31T07:51:58.33 0.1 undecidable manual S 308 0.3031 99 -0.1 92
IV.TERO.HHZ. 2021-08-31T07:51:58.24 0.1 undecidable manual S 67 0.3067 99 -0.3 90
IV.NRCA.HHZ. 2021-08-31T07:51:54.07 3.0 negative manual Pg 0.81 0
IV.LNSS.HHZ. 2021-08-31T07:51:54.43 0.1 undecidable manual S 306 0.1637 114 -0.01 96
IV.SMA1.EHE. 2021-08-31T07:51:54.41 0.1 undecidable manual S 35 0.1511 117 0.3 92
IV.CAMP.HHE. 2021-08-31T07:51:54.06 0.1 undecidable manual S 78 0.143 119 0.16 94
IV.GAVE.EHZ. 2021-08-31T07:51:53.42 0.1 undecidable manual P 308 0.3031 99 -0.15 91
IV.TERO.HHZ. 2021-08-31T07:51:53.52 0.1 undecidable manual P 67 0.3067 99 -0.11 93
IV.ARRO.EHZ. 2021-08-31T07:51:53.34 3.0 positive manual Pn -2.08 0
IV.CAMP.HHE. 2021-08-31T07:51:51.09 0.1 undecidable manual P 78 0.143 119 0.13 95
IV.RM33.EHZ. 2021-08-31T07:51:51.56 0.1 undecidable manual S 311 0.0045 178 -0.08 98
IV.LNSS.HHZ. 2021-08-31T07:51:51.71 0.1 undecidable manual P 306 0.1637 114 0.44 90
IV.SMA1.EHE. 2021-08-31T07:51:50.74 0.1 undecidable manual P 35 0.1511 117 -0.34 91
IT.PLTA.HNZ. 2021-08-31T07:51:49.81 3.0 undecidable manual Pn -1.28 0
IV.RM33.EHZ. 2021-08-31T07:51:49.72 0.1 undecidable manual P 311 0.0045 178 0.07 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.RM33.EHE. ML:0.9 9.895E-5 0.16 AML other m 2021-08-31T07:51:51.76
IV.RM33.EHN. ML:1 0.00012195 0.24 AML other m 2021-08-31T07:51:51.94
IV.LNSS.HHN. ML:1 8.18E-5 0.46 AML other m 2021-08-31T07:51:54.71
IV.LNSS.HHE. ML:1 6.425E-5 1.26 AML other m 2021-08-31T07:51:55.94
IV.GAVE.EHE. ML:0.8 2.725E-5 0.52 AML other m 2021-08-31T07:51:59.49
IV.NRCA.HHE. ML:1.1 4.59E-5 0.12 AML other m 2021-08-31T07:51:59.65
IV.NRCA.HHN. ML:0.9 2.795E-5 0.42 AML other m 2021-08-31T07:51:59.69
IV.GAVE.EHN. ML:0.9 2.86E-5 0.86 AML other m 2021-08-31T07:51:59.31
IV.PE3.EHE. ML:2 5.7905E-5 0.76 AML other m 2021-08-31T07:52:16.59
IV.PE3.EHN. ML:2.1 6.745E-5 0.06 AML other m 2021-08-31T07:52:36.15
IV.FIR.HHE. ML:3.1 0.000306 0.64 AML other m 2021-08-31T07:52:47.57
IV.FIR.HHN. ML:3 0.0002965 0.94 AML other m 2021-08-31T07:52:50.46
IV.SERS.HHE. ML:2.8 2.215E-5 0.08 AML other m 2021-08-31T07:53:51.32
IV.SERS.HHN. ML:2.7 1.415E-5 0.26 AML other m 2021-08-31T07:53:51.46
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