Earthquake with magnitude of ML 1.8 on date 13-09-2021 and time 06:38:16 (UTC) in region 4 km E Amatrice (RI)

A magnitude ML 1.8 earthquake occured in region: 4 km E Amatrice (RI), on

  • 13-09-2021 06:38:16 (UTC)
  • 13-09-2021 08:38:16 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.623, 13.335 at 19 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
Campotosto AQ 8 542 3199
Accumoli RI 11 667 3866
Capitignano AQ 12 665 4531
Montereale AQ 13 2581 7112
Cortino TE 14 656 7768
Cittareale RI 14 482 8250
Crognaleto TE 14 1297 9547
Arquata del Tronto AP 17 1178 10725
Rocca Santa Maria TE 17 537 11262
Acquasanta Terme AP 18 2916 14178
Fano Adriano TE 18 296 14474
Valle Castellana TE 18 977 15451
Barete AQ 20 737 16188

Municipalities with at least 50000 inhabitants

An earthquake occurred to
31 Km N of L'Aquila (69753 inhabitants)
31 Km W of Teramo (54892 inhabitants)
57 Km E of Terni (111501 inhabitants)
64 Km SE of Foligno (57155 inhabitants)
68 Km W of Montesilvano (53738 inhabitants)
74 Km W of Pescara (121014 inhabitants)
75 Km W of Chieti (51815 inhabitants)
85 Km NE of Guidonia Montecelio (88673 inhabitants)
85 Km NE of Tivoli (56533 inhabitants)
94 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 1.8 2021-09-13
06:38:16
42.6228 13.3352 19 2021-09-13
06:44:24
Sala Sismica INGV-Roma 95372021
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-09-13 06:38:16 ± 0.1
Latitude 42.6228 ± 0.0045
Longitude 13.3352 ± 0.0061
Depth (km) 19 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 95372021

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 458
Semi-minor axis of confidence ellipse (meter) 231
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 72
Circular confidence region, given by single value of horizontal uncertainty (meter) 460
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 71
Number of associated phases, regardless of their use for origin computation 26
Number of defining phases 26
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.18
Epicentral distance of station closest to the epicenter (degree) 0.00809
Epicentral distance of station farthest from the epicenter (degree) 0.55758
Number of stations at which the event was observed 14
Number of stations from which data was used for origin computation 14
Magnitude information

ML:1.8

Field Value
Value 1.8
Uncertainty 0.2
Num. used stations 20
Type of magnitude ML
Reference to an origin 95372021
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-09-13 06:44:24
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.MML1.EHZ. 2021-09-13T06:38:36.46 0.3 undecidable manual S 332 0.5576 99 0.35 67
IV.CSP1.EHZ. 2021-09-13T06:38:33.99 0.6 undecidable manual S 349 0.4784 101 0.2 47
IV.MF5.EHZ. 2021-09-13T06:38:31.60 0.6 undecidable manual S 14 0.3759 105 0.77 41
IV.MC2.EHZ. 2021-09-13T06:38:29.05 0.6 undecidable manual S 340 0.3076 109 0.16 49
IV.GAVE.EHZ. 2021-09-13T06:38:29.65 0.6 undecidable manual S 282 0.3318 107 0.09 48
IV.MML1.EHZ. 2021-09-13T06:38:27.93 0.1 undecidable manual P 332 0.5576 99 -0.09 93
IV.MMO1.EHZ. 2021-09-13T06:38:27.85 0.6 undecidable manual S 359 0.2761 112 -0.17 48
IV.LNSS.HHZ. 2021-09-13T06:38:26.57 0.6 undecidable manual S 265 0.2176 119 0.13 49
IV.VCEL.EHZ. 2021-09-13T06:38:26.21 0.1 undecidable manual P 121 0.4371 102 0.23 92
IV.CSP1.EHZ. 2021-09-13T06:38:26.51 1.0 undecidable manual P 349 0.4784 101 -0.17 23
IV.MF5.EHZ. 2021-09-13T06:38:25.15 0.1 positive manual P 14 0.3759 105 0.18 95
IV.ARRO.EHZ. 2021-09-13T06:38:25.35 1.0 undecidable manual P 264 0.4209 103 -0.37 23
IV.TERO.HHZ. 2021-09-13T06:38:25.93 0.6 undecidable manual S 90 0.1979 122 0.01 51
IV.MTRA.EHZ. 2021-09-13T06:38:24.26 0.6 undecidable manual S 19 0.1412 133 -0.33 47
IV.RM33.EHZ. 2021-09-13T06:38:24.89 0.6 undecidable manual S 218 0.1439 132 0.23 48
IV.CAMP.HHZ. 2021-09-13T06:38:23.87 0.6 undecidable manual S 148 0.1025 143 0.04 51
IV.GAVE.EHZ. 2021-09-13T06:38:23.96 0.1 positive manual P 282 0.3318 107 -0.27 95
IV.MMO1.EHZ. 2021-09-13T06:38:23.28 0.3 undecidable manual P 359 0.2761 112 -0.06 74
IV.MC2.EHZ. 2021-09-13T06:38:23.66 0.1 undecidable manual P 340 0.3076 109 -0.19 96
IV.TERO.HHZ. 2021-09-13T06:38:22.02 0.1 positive manual P 90 0.1979 122 -0.12 100
IV.LNSS.HHZ. 2021-09-13T06:38:22.29 0.1 positive manual P 265 0.2176 119 -0.14 99
IV.SMA1.EHZ. 2021-09-13T06:38:22.95 0.6 undecidable manual S 0 0.0081 177 0.1 52
IV.MTRA.EHZ. 2021-09-13T06:38:21.18 0.1 negative manual P 19 0.1412 133 -0.19 99
IV.RM33.EHZ. 2021-09-13T06:38:21.21 1.0 negative manual P 218 0.1439 132 -0.19 25
IV.SMA1.EHZ. 2021-09-13T06:38:20.37 0.6 undecidable manual P 0 0.0081 177 0.01 53
IV.CAMP.HHZ. 2021-09-13T06:38:20.90 0.6 undecidable manual P 148 0.1025 143 -0.03 52
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SMA1.EHE. ML:1.7 0.00044 0.52 AML other m 2021-09-13T06:38:23.08
IV.SMA1.EHN. ML:1.6 0.0003785 0.48 AML other m 2021-09-13T06:38:23.11
IV.CAMP.HHN. ML:1.4 0.0001725 1.78 AML other m 2021-09-13T06:38:23.99
IV.CAMP.HHE. ML:1.4 0.0001735 1.74 AML other m 2021-09-13T06:38:24.94
IV.MTRA.EHN. ML:1.9 0.000489 0.34 AML other m 2021-09-13T06:38:24.35
IV.MTRA.HNN. ML:1.8 0.000469 0.54 AML other m 2021-09-13T06:38:24.35
IV.MTRA.EHE. ML:1.8 0.000429 0.24 AML other m 2021-09-13T06:38:24.70
IV.MTRA.HNE. ML:1.8 0.000417 0.24 AML other m 2021-09-13T06:38:24.70
IV.RM33.HNN. ML:1.8 0.00047 0.08 AML other m 2021-09-13T06:38:25.07
IV.RM33.EHN. ML:1.9 0.0005145 0.78 AML other m 2021-09-13T06:38:25.07
IV.RM33.EHE. ML:2.1 0.0007895 1.14 AML other m 2021-09-13T06:38:25.10
IV.RM33.HNE. ML:2 0.0007265 1.16 AML other m 2021-09-13T06:38:25.09
IV.TERO.HHE. ML:2.2 0.0008795 1.68 AML other m 2021-09-13T06:38:25.96
IV.TERO.HHN. ML:2 0.0006245 1.54 AML other m 2021-09-13T06:38:26.20
IV.ARRO.EHE. ML:1.3 5.315E-5 0.06 AML other m 2021-09-13T06:38:26.43
IV.LNSS.HHE. ML:1.9 0.0003725 0.26 AML other m 2021-09-13T06:38:26.68
IV.LNSS.HHN. ML:1.7 0.000268 0.2 AML other m 2021-09-13T06:38:26.90
IV.GAVE.EHE. ML:1.9 0.0002605 0.2 AML other m 2021-09-13T06:38:30.04
IV.GAVE.EHN. ML:1.8 0.0002415 0.6 AML other m 2021-09-13T06:38:30.30
IV.FDMO.HHN. ML:1.4 6.035E-5 0.22 AML other m 2021-09-13T06:38:33.60
IV.FDMO.HHE. ML:0 3.895E-5 1.84 AML other m 2021-09-13T06:38:33.05
IV.VCEL.EHE. ML:0 0.000116 0.96 AML other m 2021-09-13T06:38:35.92
IV.ARRO.EHN. ML:0 3.425E-5 0.2 AML other m 2021-09-13T06:38:35.74
IV.VCEL.EHN. ML:0 0.0001315 0.38 AML other m 2021-09-13T06:38:36.20
IV.MML1.EHE. ML:0 3.34E-5 0.22 AML other m 2021-09-13T06:38:36.77
IV.MML1.EHN. ML:0 3.15E-5 0.6 AML other m 2021-09-13T06:38:37.56
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