Earthquake with magnitude of ML 1.1 on date 04-08-2020 and time 07:22:51 (UTC) in region 4 km N Amatrice (RI)

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

  • 04-08-2020 07:22:51 (UTC)
  • 04-08-2020 09:22:51 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.67, 13.3 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
Amatrice RI 4 2657 2657
Accumoli RI 6 667 3324
Arquata del Tronto AP 12 1178 4502
Cittareale RI 13 482 4984
Campotosto AQ 13 542 5526
Acquasanta Terme AP 14 2916 8442
Capitignano AQ 16 665 9107
Montereale AQ 17 2581 11688
Cortino TE 18 656 12344
Valle Castellana TE 18 977 13321
Rocca Santa Maria TE 18 537 13858
Crognaleto TE 20 1297 15155
Montegallo AP 20 523 15678

Municipalities with at least 50000 inhabitants

An earthquake occurred to
33 Km W of Teramo (54892 inhabitants)
36 Km N of L'Aquila (69753 inhabitants)
55 Km E of Terni (111501 inhabitants)
59 Km SE of Foligno (57155 inhabitants)
71 Km W of Montesilvano (53738 inhabitants)
78 Km W of Pescara (121014 inhabitants)
79 Km W of Chieti (51815 inhabitants)
88 Km NE of Guidonia Montecelio (88673 inhabitants)
89 Km NE of Tivoli (56533 inhabitants)
89 Km SE of Perugia (166134 inhabitants)
Recent and historical Seismicity
Seismic hazard
Shakemap
Felt maps
The earthquake effects in MCS scale as obtained from the compiled questionnaire

The earthquake effects in MCS scale as obtained from the compiled 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 2020-08-04
07:22:51
42.67 13.3 12 2020-08-04
07:32:49
Sala Sismica INGV-Roma 81628691
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-08-04 07:22:51 ± 0.09
Latitude 42.67 ± 0.00
Longitude 13.30 ± 0.00
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 81628691

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 429
Semi-minor axis of confidence ellipse (meter) 125
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 44
Circular confidence region, given by single value of horizontal uncertainty (meter) 430
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 68
Number of associated phases, regardless of their use for origin computation 40
Number of defining phases 20
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.23
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.25811
Number of stations at which the event was observed 27
Number of stations from which data was used for origin computation 10
Magnitude information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.2
Num. used stations 14
Type of magnitude ML
Reference to an origin 81628691
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-08-04 07:32:49
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
AC.VLO.HHZ. 2020-08-04T07:25:14.88 3.0 undecidable manual Sn 1.77 0
ST.GAGG.HHZ. 2020-08-04T07:24:53.46 3.0 undecidable manual Sg 13.89 0
ST.DOSS.HHZ. 2020-08-04T07:24:35.87 3.0 undecidable manual Sn 2.47 0
OX.CIMO.HHZ. 2020-08-04T07:24:32.55 3.0 undecidable manual Sn -4.32 0
OX.DRE.HHZ. 2020-08-04T07:24:25.72 3.0 undecidable manual Sn -6.77 0
IV.TREG.HNZ. 2020-08-04T07:24:19.63 3.0 undecidable manual Sn -6.24 0
IV.ECTS.HHZ. 2020-08-04T07:24:07.26 3.0 undecidable manual Pn -2.47 0
ST.GAGG.HHZ. 2020-08-04T07:24:03.77 3.0 undecidable manual Pg 10.67 0
ST.RONC.HNZ. 2020-08-04T07:23:58.49 3.0 undecidable manual Pg 5.06 0
OX.CIMO.HHZ. 2020-08-04T07:23:55.58 3.0 positive manual Pg 4 0
IV.SARZ.HHZ. 2020-08-04T07:23:54.59 3.0 negative manual Pn 0.63 0
IV.CMPR.HHZ. 2020-08-04T07:23:40.98 3.0 undecidable manual Pn 1.33 0
IV.SGG.HHZ. 2020-08-04T07:23:40.89 3.0 undecidable manual S -3.56 0
IV.MTMR.EHZ. 2020-08-04T07:23:34.07 3.0 undecidable manual Pg 3.01 0
IT.UMBT.HGZ. 2020-08-04T07:23:26.67 3.0 undecidable manual S -1.45 0
IV.PTRJ.HNZ. 2020-08-04T07:23:23.82 3.0 undecidable manual Pg 0.58 0
IV.ROSPO.HHZ. 2020-08-04T07:23:16.92 3.0 undecidable manual P -1.98 0
IV.SEF1.HNZ. 2020-08-04T07:23:10.26 3.0 undecidable manual S -4.07 0
IT.UMBT.HGZ. 2020-08-04T07:23:09.36 3.0 negative manual P -3.6 0
IV.MNTP.HNZ. 2020-08-04T07:23:03.00 3.0 undecidable manual P -0.99 0
IV.MC2.EHN. 2020-08-04T07:23:01.79 0.3 undecidable manual S 341 0.2581 95 0.1 73
IV.NRCA.HHZ. 2020-08-04T07:23:00.23 0.3 undecidable manual S 320 0.2167 97 -0.24 72
IV.MMO1.HNZ. 2020-08-04T07:23:00.93 0.3 undecidable manual S 4 0.232 96 0 74
IV.TERO.HHZ. 2020-08-04T07:23:00.36 0.6 undecidable manual S 101 0.2248 96 -0.35 46
IV.RM33.EHZ. 2020-08-04T07:22:59.05 0.3 undecidable manual S 203 0.1718 101 -0.1 73
IV.LNSS.HHZ. 2020-08-04T07:22:59.88 0.3 undecidable manual S 252 0.2041 97 -0.23 71
IV.CAMP.HHE. 2020-08-04T07:22:58.42 0.3 undecidable manual S 150 0.1529 105 -0.18 72
IV.MTRA.EHZ. 2020-08-04T07:22:57.32 0.3 undecidable manual S 37 0.1124 119 -0.16 74
IV.MMO1.HNZ. 2020-08-04T07:22:57.59 0.3 undecidable manual P 4 0.232 96 0.62 64
IV.T1299.HNE. 2020-08-04T07:22:56.04 0.3 undecidable manual S 206 0.0369 157 0.06 76
IV.TERO.HHZ. 2020-08-04T07:22:56.82 0.1 undecidable manual P 101 0.2248 96 -0.03 98
IV.MC2.EHN. 2020-08-04T07:22:56.84 0.3 undecidable manual P 341 0.2581 95 -0.57 65
IV.RM33.EHZ. 2020-08-04T07:22:56.10 0.6 positive manual P 203 0.1718 101 0.15 49
IV.LNSS.HHZ. 2020-08-04T07:22:56.61 0.1 undecidable manual P 252 0.2041 97 0.11 98
IV.NRCA.HHZ. 2020-08-04T07:22:56.78 0.1 undecidable manual P 320 0.2167 97 0.07 99
IV.MTRA.EHZ. 2020-08-04T07:22:55.16 0.1 negative manual P 37 0.1124 119 0.17 98
IV.SMA1.EHZ. 2020-08-04T07:22:55.80 0.3 undecidable manual S 148 0.0432 153 -0.26 74
IV.CAMP.HHE. 2020-08-04T07:22:55.73 0.1 undecidable manual P 150 0.1529 105 0.1 100
IV.T1299.HNE. 2020-08-04T07:22:54.38 0.1 undecidable manual P 206 0.0369 157 0.26 98
IV.SMA1.EHZ. 2020-08-04T07:22:54.37 0.1 undecidable manual P 148 0.0432 153 0.2 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MTRA.EHN. ML:1.3 0.0001935 0.16 AML other m 2020-08-04T07:22:57.39
IV.MTRA.EHE. ML:1.2 0.000168 0.32 AML other m 2020-08-04T07:22:57.43
IV.SMA1.EHE. ML:1.3 0.0002898183 0.0992 AML other m 2020-08-04T07:22:56.07
IV.SMA1.EHN. ML:1.4 0.00030474905 0.1408 AML other m 2020-08-04T07:22:56.08
IV.MTRA.HNE. ML:1.1 0.000131542885 0.128 AML other m 2020-08-04T07:22:57.49
IV.MTRA.HNN. ML:1.3 0.00018539965 0.1504 AML other m 2020-08-04T07:22:57.46
IV.RM33.EHE. ML:0.7 3.8981105E-5 0.3392 AML other m 2020-08-04T07:23:01.44
IV.RM33.EHN. ML:0.7 3.3465115E-5 0.1408 AML other m 2020-08-04T07:23:00.13
IV.LNSS.HHE. ML:1 6.268483E-5 0.1408 AML other m 2020-08-04T07:23:00.37
IV.LNSS.HHN. ML:1 6.2321285E-5 0.3392 AML other m 2020-08-04T07:23:00.25
IV.NRCA.HHE. ML:0.9 4.7765215E-5 0.16 AML other m 2020-08-04T07:23:01.10
IV.NRCA.HHN. ML:1 5.272708E-5 0.08 AML other m 2020-08-04T07:23:00.60
IV.TERO.HHE. ML:0.9 4.478722E-5 0.0608 AML other m 2020-08-04T07:23:00.68
IV.TERO.HHN. ML:0.8 3.7817045E-5 0.0608 AML other m 2020-08-04T07:23:01.59
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download