Istituto Nazionale di Geofisica e Vulcanologia

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) 42.6220, 13.3330 at 20 km depth.

The earthquake was located by: Bollettino Sismico Italiano INGV.

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.

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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
Cittareale RI 14 482 7594
Cortino TE 14 656 8250
Crognaleto TE 15 1297 9547
Arquata del Tronto AP 17 1178 10725
Rocca Santa Maria TE 18 537 11262
Acquasanta Terme AP 18 2916 14178
Fano Adriano TE 19 296 14474
Valle Castellana TE 19 977 15451
Barete AQ 19 737 16188
Cagnano Amiterno AQ 20 1369 17557

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)
63 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
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Bulletin
Rev1000 		ML 1.8 2021-09-13
06:38:16		 42.6217 13.3327 20 2022-03-30
13:04:34		 Bollettino Sismico Italiano INGV 100560521
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 ± 0.09
Latitude 42.6217 ± 0.0027
Longitude 13.3327 ± 0.0049
Depth (km) 20 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 100560521

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 430
Semi-minor axis of confidence ellipse (meter) 62
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 247
Circular confidence region, given by single value of horizontal uncertainty (meter) 430.0
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 33
Number of defining phases 33
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) 0.00899
Epicentral distance of station farthest from the epicenter (degree) 0.55848
Number of stations at which the event was observed 18
Number of stations from which data was used for origin computation 18
Magnitudes information

ML:1.8

Field Value
Value 1.8
Uncertainty 0.3
Num. used stations 24
Type of magnitude ML
Reference to an origin 100560521
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2022-02-03 11:26:29

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(km) Takeoff_angle Residual Weight
IV.MML1.EHZ. 2021-09-13T06:38:36.46 0.3 undecidable manual S 332 61.9935 100 0.41 61
IV.CSP1.EHZ. 2021-09-13T06:38:33.99 0.6 undecidable manual S 349 53.2023 102 0.24 43
IV.MF5.EHZ. 2021-09-13T06:38:31.60 0.6 undecidable manual S 14 41.9247 106 0.77 37
IV.MC2.EHZ. 2021-09-13T06:38:29.05 0.6 undecidable manual S 340 34.2435 111 0.18 45
IV.GAVE.EHZ. 2021-09-13T06:38:29.65 0.6 undecidable manual S 282 36.6411 109 0.17 45
IV.MML1.EHZ. 2021-09-13T06:38:27.90 0.3 undecidable manual P 332 61.9935 100 -0.04 67
IV.MMO1.EHZ. 2021-09-13T06:38:27.85 0.6 undecidable manual S 359 30.8469 113 -0.18 46
IV.NRCA.HNZ. 2021-09-13T06:38:27.43 0.1 undecidable manual S 323 29.4483 115 -0.28 91
IV.CSP1.EHZ. 2021-09-13T06:38:26.51 1.0 undecidable manual P 349 53.2023 102 -0.1 22
IV.LNSS.HHZ. 2021-09-13T06:38:26.57 0.6 undecidable manual S 265 23.9538 121 0.17 46
IV.GIGS.HJZ. 2021-09-13T06:38:26.99 0.1 undecidable manual S 134 27.0507 117 -0.14 92
IV.VCEL.EHZ. 2021-09-13T06:38:26.09 0.3 undecidable manual P 121 48.618 103 0.18 67
IV.FAGN.HHZ. 2021-09-13T06:38:25.94 0.3 undecidable manual P 152 44.5221 105 0.63 61
IV.MF5.EHZ. 2021-09-13T06:38:25.15 0.1 positive manual P 14 41.9247 106 0.23 89
IV.ARRO.EHZ. 2021-09-13T06:38:25.35 1.0 undecidable manual P 264 46.5201 104 -0.26 22
IV.TERO.HHZ. 2021-09-13T06:38:25.93 0.6 undecidable manual S 90 22.1556 124 -0.06 47
IV.MTRA.EHZ. 2021-09-13T06:38:24.26 0.6 undecidable manual S 19 15.873 135 -0.43 45
IV.RM33.EHZ. 2021-09-13T06:38:24.89 0.6 undecidable manual S 218 15.7731 135 0.22 47
IV.MC2.EHZ. 2021-09-13T06:38:23.66 0.1 undecidable manual P 340 34.2435 111 -0.13 92
IV.CAMP.HHZ. 2021-09-13T06:38:23.87 0.6 undecidable manual S 147 11.3775 145 -0.05 48
IV.T1299.HNZ. 2021-09-13T06:38:23.27 0.1 undecidable manual S 289 4.3956 166 0.14 96
IV.GAVE.EHZ. 2021-09-13T06:38:23.96 0.1 positive manual P 282 36.6411 109 -0.18 91
IV.MMO1.EHZ. 2021-09-13T06:38:23.28 0.3 undecidable manual P 359 30.8469 113 -0.03 71
IV.TERO.HHZ. 2021-09-13T06:38:22.02 0.1 positive manual P 90 22.1556 124 -0.11 94
IV.LNSS.HHZ. 2021-09-13T06:38:22.29 0.1 positive manual P 265 23.9538 121 -0.08 95
IV.GIGS.HJZ. 2021-09-13T06:38:22.61 0.1 negative manual P 134 27.0507 117 -0.18 91
IV.NRCA.HNZ. 2021-09-13T06:38:22.87 0.1 positive manual P 323 29.4483 115 -0.25 91
IV.SMA1.EHZ. 2021-09-13T06:38:22.95 0.6 undecidable manual S 12 0.999 177 -0.04 50
IV.RM33.EHZ. 2021-09-13T06:38:21.39 0.1 positive manual P 218 15.7731 135 0.02 98
IV.MTRA.EHZ. 2021-09-13T06:38:21.18 0.1 negative manual P 19 15.873 135 -0.2 94
IV.SMA1.EHZ. 2021-09-13T06:38:20.40 0.1 negative manual P 12 0.999 177 0.01 100
IV.CAMP.HHZ. 2021-09-13T06:38:20.94 0.1 negative manual P 147 11.3775 145 0.01 98
IV.T1299.HNZ. 2021-09-13T06:38:20.50 0.1 negative manual P 289 4.3956 166 0.03 99
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:1.9 0.000469 0.54 AML other m 2021-09-13T06:38:24.35
IV.MTRA.HNE. ML:1.8 0.00041700000000000005 0.24 AML other m 2021-09-13T06:38:24.70
IV.MTRA.EHE. ML:1.8 0.000429 0.24 AML other m 2021-09-13T06:38:24.70
IV.RM33.HNN. ML:1.9 0.00047000000000000004 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.HNE. ML:2.0 0.0007264999999999999 1.16 AML other m 2021-09-13T06:38:25.09
IV.RM33.EHE. ML:2.1 0.0007894999999999999 1.14 AML other m 2021-09-13T06:38:25.10
IV.TERO.HHE. ML:2.2 0.0008795 1.68 AML other m 2021-09-13T06:38:25.96
IV.TERO.HHN. ML:2.1 0.0006245000000000001 1.54 AML other m 2021-09-13T06:38:26.20
IV.ARRO.EHE. ML:1.3 0.000053150000000000004 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.VCEL.EHE. ML:1.7 0.00011599999999999999 0.96 AML other m 2021-09-13T06:38:35.92
IV.ARRO.EHN. ML:1.1 0.000034250000000000006 0.2 AML other m 2021-09-13T06:38:35.74
IV.VCEL.EHN. ML:1.7 0.0001315 0.38 AML other m 2021-09-13T06:38:36.20
IV.MML1.EHE. ML:1.3 0.0000334 0.22 AML other m 2021-09-13T06:38:36.77
IV.MML1.EHN. ML:1.2 0.0000315 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